Therapy guide · medical education
Tinea versicolor (pityriasis versicolor): the full therapy pathway
A yeast overgrowth that is cured in a fortnight and looks uncured for half a year — because killing the organism and repairing the colour it left behind are two different clocks, and only one of them answers to treatment.
Before anything else
Not everyone should start at the bottom of this pathway. These presentations are reasons to
see a clinician without waiting out an over-the-counter trial first.
- Patches that are chalk-white, sharply edged and completely smooth Worth a clinician visit
Total loss of pigment with no scale, particularly if it is symmetrical or clustered around the eyes, mouth, hands or joints, fits vitiligo rather than a yeast overgrowth. Antifungal treatment does nothing for it, and the treatments that do help work better started early.
- A widespread scaly rash that also involves the palms or the soles See a dermatologist soon
This condition spares palms and soles. A scaly eruption that reaches them, particularly alongside feeling unwell, swollen glands or a recent illness, points at a different diagnosis that needs identifying rather than treating with an antifungal wash.
- Extensive involvement in someone immunosuppressed or on long-term steroids See a dermatologist soon
Immunosuppression, corticosteroid therapy and raised cortisol are recognised predisposing factors, and disease in that setting tends to be wider, more stubborn, and worth assessing alongside whatever else is going on rather than in isolation.
- A single patch that keeps enlarging, thickens, bleeds or will not heal Worth a clinician visit
This condition produces many patches rather than one, and they do not ulcerate. A solitary lesion behaving differently from the rest is a reason to have it examined, not a reason to reach for another antifungal.
- Scaling patches in a child who has not reached puberty Worth a clinician visit
The overgrowth depends on sebaceous activity and is genuinely uncommon before puberty. It does occur, but a scaly discoloured rash in a young child deserves a proper look at what it actually is before being treated as this.
Where this sits, and whether it is even the right page
This questionnaire has two jobs. The first is separating a scaling yeast overgrowth from the other things that leave patches on a trunk, since several of them look similar and none of them is treated this way. The second is placing the reader at the right point of a condition where the infection and the discolouration run on different clocks. Answers stay in this browser.
Seven questions about the patches, how much skin is involved, and what has already been tried. The result names a route, or says the pattern points elsewhere — which is a useful answer rather than a failed one.
One thing to be clear about. Nothing here is a diagnosis. What it does is weigh the handful of features that genuinely separate this condition from its look-alikes and say which way they lean; scale examined under a microscope is what settles the question, and that takes a clinician a few minutes.
What this looks like
There is no formal severity scale for this condition and inventing one would add precision that does not exist. What does change the plan is a pair of practical questions: how much skin is involved, and whether this is a first episode or the fifth. A third situation belongs on the same map even though no yeast is left in it — skin that has been treated successfully and is still visibly uneven, which is where most of the confusion around this condition lives.
Limited and recent
A handful of patches over one region, usually the upper back, chest or shoulders, noticed within the last few weeks or after a warm spell.
What it looks like: Oval or round patches with slightly irregular edges, running together where they meet, shedding a fine dust when the surface is scratched or the skin stretched.
Widespread
Patches covering much of the trunk, sometimes extending onto the neck, upper arms, thighs or face.
What it looks like: Confluent discolouration across the back and chest rather than discrete spots. Topical treatment still works here but becomes impractical to apply properly, which is the usual reason oral therapy is discussed.
Returning, usually seasonally
Clears with treatment and comes back — most often each summer, or on return from a hot climate, or in step with heavy sweating.
What it looks like: The same distribution reappearing in the same person, who by now recognises it immediately. Recurrence rates of sixty to ninety per cent within two years of treatment are reported, so this is the expected long-run behaviour rather than a treatment failure.
Treated, still discoloured
The scale has gone and the patches are smooth, but the colour difference remains and has not moved for weeks.
What it looks like: Flat, non-scaling patches that are lighter or slightly darker than the surrounding skin. This is what a cured infection looks like while the pigment catches up, and it is not a reason to treat again.
Three things that change the plan regardless of severity
Heat, humidity and sweating
Warm damp skin is the condition the overgrowth needs, which is why this appears in summer, in tropical climates, and in people whose work or sport keeps them sweating. It also makes the timing of prevention obvious: an intermittent wash restarted a few weeks before the season that usually triggers it is doing something that the same wash started in August cannot.
Immunosuppression, long-term steroids or high cortisol
Suppressed immunity, corticosteroid treatment and raised plasma cortisol all appear among the recognised predisposing factors. Disease tends to be more extensive and less inclined to stay away, and a home course is a poorer first move than an appointment where the wider picture can be looked at.
Adolescence, pregnancy, oral contraceptives
The yeast depends on sebum, so the condition tracks sebaceous activity: it is common in teenagers and young adults and rare before puberty. Pregnancy and combined oral contraceptives are both listed among the associations, and pregnancy separately narrows the treatment options, which makes the combination worth naming rather than discovering later.
Deeper skin tones
The infection behaves identically, but a pale patch on deeply pigmented skin is far more conspicuous and takes longer to stop being conspicuous. That changes nothing about which antifungal is used and a great deal about how the result is judged — the temptation to keep treating skin that is already cured is strongest exactly where the colour difference reads loudest.
What else it could be
- Vitiligo — Chalk-white rather than a few shades lighter, sharply outlined, with no scale at all, and often symmetrical or around the mouth, eyes, hands and joints. It does not respond to antifungals and is managed on a completely different route.
- Pityriasis alba — Faint, poorly outlined pale patches with a dry, powdery surface, usually on the face and upper arms of children and adolescents, and often in people with a history of eczema. It fades on its own with moisturising and sun protection.
- Post-inflammatory hypopigmentation — Pale marks sitting exactly where an earlier rash, spot or scratch was, matching that history in shape and position. Nothing is growing in them; time and sun protection are the whole treatment.
- Seborrhoeic dermatitis on the trunk — Driven by the same yeast and answering to the same antifungals, but pinker, greasier-scaled and concentrated over the breastbone and between the shoulder blades rather than scattered as discrete ovals.
- Erythrasma — A bacterial overgrowth of skin folds — groin, armpits, under the breasts — producing brown, finely wrinkled patches. Under a Wood lamp it glows coral pink rather than the gold-green of this condition, which makes the lamp genuinely decisive here.
Two questions separate this from most of its look-alikes without any equipment. Does the surface shed a fine dust when it is scratched or the skin is stretched, and are the patches a few shades off rather than pure white? Fine scale plus partial colour loss points here; a smooth, sharply outlined, milk-white patch points somewhere else entirely and is worth having looked at rather than treated.
Why it happens
Malassezia yeasts live on almost every adult trunk as ordinary resident flora, feeding on the lipids in sebum. Tinea versicolor happens when that resident population shifts into a filament-forming state and colonises the outermost layer of skin, the stratum corneum. The result is patches of finely scaling skin that are a different colour from everything around them — sometimes paler, sometimes tan or pink, often several shades at once on the same back, which is where the word versicolor comes from. Because the yeast is a normal inhabitant rather than something caught from anyone, the infection is not passed between people, and clearing it does not remove the organism from the skin.
Anyone who noticed uneven patches across the chest, back, shoulders or neck after a hot summer or a humid trip, anyone whose skin will not tan evenly in one region, and anyone who finished an antifungal course weeks ago and is still looking at the same map of discoloured skin wondering whether the treatment did anything at all.
Orientation, not diagnosis. This page orients rather than diagnoses. Several conditions produce pale or uneven patches on a trunk — vitiligo, the faint dry patches of pityriasis alba, marks left behind by an earlier rash — and they are managed in entirely different directions. The features that separate them are described below, and a clinician can settle the question in minutes with a lamp, a scraping, or a hand lens.
No prescription needed for any of this The over-the-counter pathway
The over-the-counter tier here is not a holding position — it is first-line treatment, and in most countries it is also cheap. Topical antifungals clear the great majority of limited disease, and several of the agents with the strongest supporting trials are sold without a prescription somewhere in the world: clotrimazole and terbinafine creams from any pharmacy, ketoconazole and selenium sulfide and zinc pyrithione as medicated shampoos used on the body rather than the scalp. What the aisle cannot sell is the second half of the job. Once the yeast is gone the patches remain visible for weeks to months while pigment recovers, and nothing on any shelf meaningfully speeds that up. Sun protection matters during that stretch, and it matters for a reason people find counter-intuitive: it stops the surrounding skin darkening further and widening the gap.
Appropriate for: Every limited and moderate presentation as the starting point, and every extensive one as the treatment that continues alongside anything taken by mouth. It is also the whole of what is useful in the pigment-recovery phase, where the active work is protection and time rather than antifungal treatment.
The treatment part of this pathway is short, cheap and reliable. The part that takes patience comes afterwards, and it is where nearly all the wasted effort in this condition happens — so the chart below spends more of its length on what to do once the infection has gone than on getting rid of it.
The rule this whole page is built on: the cure finishes months before the colour does
Two weeks of a topical antifungal clears the yeast from the skin's outer layer in most limited cases. The patches it produced do not go with it. Pigment-producing cells in the affected skin have been suppressed and take weeks to months to resume normal output, and while they do, the skin looks exactly as it did during the infection. Almost everything that goes wrong here follows from reading those surviving patches as an uncured infection: another course, then another, then a conclusion that nothing works — when the treatment worked the first time and the only missing ingredient was time. The endpoint that means cured is the disappearance of fine scale, not the return of colour.
Four rules that matter more than which product ends up in the basket
- Judge by scale, not by colour. Active patches shed a fine dust when scratched or when the skin is stretched; treated ones are smooth and simply the wrong shade. Once the dust has gone, the infection has gone, whatever the mirror suggests.
- Treat the whole region rather than the visible patches. The organism is spread across more skin than the discolouration marks, so covering only what shows leaves colonised skin between the patches — which is why it so often reappears in the gaps within weeks.
- Sun makes the contrast worse before it makes it better. Affected skin cannot tan while it is recovering and the skin around it can, so deliberate sun exposure to blend the patches in widens the difference instead of closing it.
- Decide the prevention before the season, not during it. Recurrence within two years is reported in the majority of cases, and an intermittent wash restarted a few weeks ahead of whichever months usually trigger it does something the same product started mid-flare cannot.
Answer as you go and the chart tracks where you are. Nothing is sent anywhere.
- Day 0You are here
Check that this is the right condition
Separate a scaling yeast overgrowth from the several other things that make patches on a trunk, before spending a fortnight treating the wrong one.
What this step involves
Morning
- Scratch a patch gently, or stretch the skin over it A fine, dry, dust-like scale lifting from the surface is the sign that supports this condition. Skin that stays completely smooth under the same test is pointing somewhere else, and the difference is worth establishing before anything is bought.
- Look at how far off the colour actually is A few shades lighter, tan or faintly pink all fit here. Chalk-white with a sharp border, particularly around the eyes, mouth, hands or joints, does not, and is a reason to have it examined rather than treated.
Evening
- Photograph the area in even, indirect light The back is somewhere nobody can assess by eye, and pigment recovery is slow enough to be invisible week to week. A dated photograph taken now is what makes the four-week judgement honest instead of impressionistic.
Why this step: The mimics of this condition are managed in entirely different directions — vitiligo, pityriasis alba and post-inflammatory marks among them — and none of them responds to antifungal treatment. Two features, fine scale and partial rather than total colour loss, do most of the separating without any equipment, and settling them first is what makes the following fortnight interpretable.
Ready for the next step?
Is fine scale present, and is the colour a few shades off rather than pure white?
Yes — scaly, and partly discoloured: That pattern fits. Go to step 2 ↓ Go to step 1 ↓
No scale, or the patches are completely white: That combination points away from this condition, and an appointment is a better next move than a fortnight of antifungal treatment. The red flags above cover what makes it more urgent.
- Weeks 1–2You are here
The antifungal course
Clear the organism from the outer layer of skin across the whole affected region, not only where the discolouration shows.
What this step involves
Morning
- A medicated wash across the region, in the shower Ketoconazole, selenium sulfide or zinc pyrithione, whichever the local pharmacy stocks. Applied to wet skin over the entire area and a margin beyond it, then left in place for several minutes before rinsing — the minutes on the skin are the part the trials were measuring. Browse all ketoconazole products →
Evening
- Or a cream, where only a few patches are involved Clotrimazole, miconazole or terbinafine cream, applied thinly over the patches and the normal-looking skin around them, once or twice daily. Cream is the better format for a small defined area and an unrealistic one for a whole back.
- Something bland afterwards if the skin dries out Medicated washes are drying by design, and dry skin flakes in a way that is easily confused with the condition continuing. A plain moisturiser after treatment keeps the two apart. Browse all moisturizers →
Why this step: Azoles block the yeast's ergosterol synthesis and its membrane fails; selenium sulfide and zinc pyrithione reduce the population less specifically. All of them act on organisms living in the outermost layer of skin, which is why they work topically and why the treated area has to include the colonised skin between the visible patches rather than only the patches themselves.
What's normal: Dryness and mild tightness across the treated area are expected. Real burning, spreading redness or an area that becomes sore rather than dry means stopping and having it looked at — that is a reaction to the product rather than the condition continuing.
If the wash is too harsh, particularly on the neck or face
Shorter contact and alternate days, building up from there. Thinner skin above the collarbone tolerates a shampoo-strength product much less well than a back does, and a diluted, gentler schedule that gets completed beats an aggressive one abandoned on the fourth evening.
Ready for the next step?
Has the whole affected region had daily treatment for two weeks, with the wash left on for several minutes each time?
Yes — the course is complete: Now comes the part that decides whether this feels solved or endless. Go to step 3 ↓ Go to step 2 ↓
Not yet, or only the visible patches were covered: Worth finishing properly before judging anything. Under-covered skin and a rushed rinse account for most of what gets recorded as treatment failure in this condition.
- Weeks 3–8You are here
Stop treating, and let the colour catch up
Recognise a cured infection that still looks like an active one, and resist the reflex to start again.
What this step involves
Morning
- Repeat the scratch test rather than assessing by colour Smooth skin that sheds nothing is skin with no infection left in it, however wrong the shade still looks. This is the single most useful check on the page and it takes a second.
- Sunscreen over the whole area, daily The recovering patches cannot produce pigment at their usual rate yet, and the skin around them can. Protection stops the background darkening away from the patches during the months they need to catch up. Browse all sunscreens →
Evening
- Compare against the photograph, not against memory Pigment moves too slowly to see day to day, and the impression of no change is what triggers the second unnecessary course. A month-old image usually shows movement that the mirror does not.
Why this step: The colour change is not caused by anything the antifungal can still act on. Affected skin has had its pigment production suppressed, and the cells resume normal output over weeks to months — an interval the approved labelling for ketoconazole shampoo describes directly, noting that normalisation is variable, may take months, and depends on skin type and incidental sun exposure. Re-treating during that window adds irritation and cost and changes nothing about the timetable.
Where the patches were darker rather than lighter, the same logic applies in reverse and the fading tends to be somewhat quicker. Either way the measure is scale.
Ready for the next step?
Is the skin smooth and shedding no scale, even though the colour is still uneven?
Yes — smooth but still discoloured: That is what a successfully treated case looks like at this stage. Go to step 4 ↓ Go to step 3 ↓
Fine scale is still there: That is a different situation and belongs at the checkpoint below, which covers what an incomplete response actually means.
- Month 2 onwardYou are here
Set up the prevention before the next season
Stop this becoming an annual event, which is the realistic goal given that the organism is a permanent resident.
What this step involves
Morning
- The same wash, weekly or fortnightly Same product, same few minutes of contact, far less often. This is the least glamorous item on the page and the one that most changes what next year looks like. Browse all selenium sulfide products →
Evening
- Step it up a few weeks ahead of the trigger season Where the pattern is summer, or a humid trip, or a training block, returning to a more frequent schedule before the skin changes is both more effective and considerably less tedious than treating a full recurrence afterwards.
- Keep sun protection going while colour is still uneven The recovery phase usually outlasts the treatment by months, and the protection that shortens it is the same protection that reduces how obvious a future episode looks. Browse all sunscreens →
Why this step: Malassezia is normal skin flora and no treatment removes it. What treatment changes is the population and the state it is in, so control is a maintained condition rather than a completed course. Understanding that from the start is what stops a third episode reading as failure — it is the documented behaviour of the condition, and an intermittent schedule is a well-established answer to it.
Ready for the next step?
Is there an intermittent schedule in place that is realistic to keep to?
Yes — it is in the routine: That completes the over-the-counter plan. The checkpoint below applies only where the scale did not clear. Go to the checkpoint ↓
Not yet: The smallest workable version beats an ideal one that lapses by spring — for many people once a fortnight through the warm months is enough to change the pattern.
The four-week checkpoint
Four weeks from the first day of treatment — earlier than most conditions on this site are judged at, because a topical antifungal that is working shows it inside a fortnight.
How to judge it: The only question that counts is whether the surface is still shedding fine scale when scratched or stretched. Colour is deliberately excluded: it lags the cure by weeks to months and grading by it manufactures a failure where there is a success.
Four weeks in, with the whole region treated rather than the visible patches — is fine scale still present?
That is the treatment having worked, exactly on schedule.
A cured case looks like this for weeks to months. The organism has gone from the outer layer of skin, the pigment cells have not yet resumed normal output, and no antifungal in any tier will speed that up. The remaining work is protection while the difference narrows, a photograph to measure against, and an intermittent schedule so the next warm season does not restart the whole sequence.
Worth finishing, then reassessing rather than escalating.
Partial response usually means partial coverage — the margins of the region, the shoulder blades, the small of the back. Extending the course by another week or two with deliberate attention to the areas that are hard to reach resolves most of these. Where it does not, an appointment is reasonable, and arriving with a completed course and a photograph makes it a much shorter conversation.
This is the handover point, and the explanation is often not the obvious one.
Four weeks of correctly applied topical treatment with no reduction in scale is better read as evidence against the diagnosis than as an argument for a stronger antifungal. Several conditions produce scaling patches on a trunk and none of them answers to this treatment. That makes the next step a clinician who can look at scale under a microscope and settle what is actually growing, rather than a stronger version of what has already failed.
Stop the product and separate the two problems.
Medicated washes are drying and can produce an irritant reaction of their own, particularly on the neck, chest and anywhere the skin is thinner. Skin that has become red, tight and uncomfortable is more likely reacting to treatment than harbouring more yeast. Stopping, letting it settle for a week or two with a plain moisturiser, and bringing that history to an appointment turns a bad fortnight into useful information.
What does not wait four weeks
A scaly rash that spreads to the palms or soles, or arrives with fever, swollen glands or feeling unwell, is a different question and needs assessing now rather than at the end of a trial. So does extensive involvement in anyone immunosuppressed or on long-term corticosteroids, where a home course is a poorer first move than an appointment. And a single patch that thickens, enlarges steadily, bleeds or fails to heal does not belong in this framework at all — that one is looked at rather than treated.
One dated photograph at the start, in even indirect light, and another every four weeks. Pigment recovery is slow enough to be genuinely invisible day to day, and the sense that nothing is happening is what drives the second and third unnecessary courses. A month-old image settles it in a way that no amount of looking in a mirror will.
Where the over-the-counter pathway ends
It ends in two quite different places. For widespread disease it ends at a practical limit rather than a pharmacological one: covering an entire trunk consistently for two weeks defeats most people, and a short oral course is a reasonable answer to a coverage problem. For everything else it ends at the edge of what can be concluded from the outside — whether scale that has not cleared means a resistant infection or a different diagnosis, and whether colour that has not moved in months means anything is still there. Both of those are answered by looking at scale under a microscope, which takes minutes and is worth asking for by name.
See the prescription pathway below →Tinea versicolor (pityriasis versicolor): the full therapy pathway · dermapproved.com/treatments/tinea-versicolor/ · not a diagnosis — confirm anything you act on with a clinician
What to expect
This is one of the fastest-clearing conditions on the site and one of the slowest-looking, which is an odd pairing and the source of nearly all the frustration around it. A correctly treated limited case usually stops shedding scale within one to two weeks. The patches then stay visible for weeks to months while pigment production recovers — an interval the approved labelling for ketoconazole shampoo describes as variable and dependent on skin type and incidental sun exposure. Recurrence is common, reported in the majority of people within two years, because the organism is normal skin flora and no treatment removes it. Set against those three facts, a realistic account reads: quick cure, slow appearance, and a genuine likelihood of a repeat performance unless something is scheduled against it.
- The endpoint that means cured is the disappearance of fine scale, not the return of even colour
- Treatment covers the whole region and a margin beyond it, because colonised skin extends past the patches that show
- Pigment recovery runs on weeks to months and no product on any tier accelerates it
- Sun exposure during recovery widens the contrast rather than blending it, because the affected skin cannot yet tan
- An intermittent schedule started before the trigger season is what changes the pattern, and the smallest version that is actually kept beats an ideal one abandoned by spring
Going back to a clinician is worth it where scale is still present after four weeks of properly applied treatment, where colour has not shifted at all after several months, where the eruption returns within weeks despite genuine intermittent use, or where immunosuppression or long-term corticosteroid treatment is part of the picture. A single patch that thickens, enlarges or fails to heal is a separate matter and is looked at rather than treated.
What would bring you back sooner
Whatever step you are on, these do not wait for the end of a trial period. They are the same
presentations listed at the top of this page — repeated here because that is where they
matter, rather than where they were easiest to put.
- Patches that are chalk-white, sharply edged and completely smooth Worth a clinician visit
- A widespread scaly rash that also involves the palms or the soles See a dermatologist soon
- Extensive involvement in someone immunosuppressed or on long-term steroids See a dermatologist soon
- A single patch that keeps enlarging, thickens, bleeds or will not heal Worth a clinician visit
- Scaling patches in a child who has not reached puberty Worth a clinician visit
Prescription only — from here on, this is a clinician's decision The prescription pathway
Why this tier exists. The ceiling is not potency, it is delivery and time. Widespread disease is hard to treat properly with a topical simply because covering a whole back consistently for two weeks is a chore most people abandon, and that is where a short oral course earns its place. The more important limit is that no over-the-counter product — and no prescription one either — repigments skin. Once the infection is gone the remaining discolouration is a pigment problem on its own timetable, and treating it as unfinished infection is the single most common way months get wasted here.
Read across for how much skin is involved and how the condition has behaved over time; read down for how far past a bottle of medicated shampoo each situation goes. The third column is unusual: it is not an escalation for disease that resisted treatment, but a route for skin where the infection has already gone and the colour has not yet followed.
The same pathway in full below — each step names what it involves, why it sits where it does, and what tells you it's time to move up. Tap any therapy to jump to its detail.
Limited patches over one area
A handful of scaling patches across the upper back, chest, shoulders or neck, recent enough that the surface still sheds fine dust when scratched. This is the presentation that responds fastest and needs the least, and the whole work after the first fortnight is holding still while colour returns.
You reach this column when: Fine scale is still present after four weeks of properly applied treatment, or new patches keep appearing outside the treated area.
- Prescription topical
Prescription-strength topical treatment
Why this step sits here: Higher-strength ketoconazole, ciclopirox or one of the other prescription azoles, usually alongside a quick look at scale under a microscope, since a limited case that resisted a proper topical course is as likely to be a different condition as a stubborn one.
When to move up
- A fair trial
- One to three weeks as prescribed, applied across the whole affected region.
- Improvement looks like
- Scaling stops and no new patches form. Again, colour is not the measure.
- Move up if
- Scale persists despite a completed prescription course, or the area involved has expanded to a point where topical application is no longer realistic.
→ The next step up this pathway.
- Prescription oral
A short oral course
Why this step sits here: Reserved here for the unusual limited case that has genuinely resisted two properly applied topical courses, which is uncommon enough to be worth reassessing the diagnosis at the same time.
The questions worth putting at this point are whether the diagnosis has been confirmed on scale rather than assumed from appearance, which oral agent fits alongside the other medicines already being taken, and what happens after the course — because a limited case that needed a tablet is a case whose pattern is worth planning around rather than closing the file on.
After a first episode: the cheap insurance
A first episode often does not repeat, particularly where something specific set it off — a fortnight somewhere humid, a summer of training, a job that ran hot for a season. What converts that possibility into a plan costs almost nothing: the same medicated wash used every week or two through whichever months usually run warm, started before the skin changes rather than after. Anyone whose first episode followed an obvious trigger has the useful information already.
Widespread, or back every year
Patches covering much of the trunk, or the same eruption returning each warm season on skin that clears reliably in between. These two look like different problems and behave like one, because both come down to a resident organism finding conditions it likes across a large area, and both are answered by a short course followed by a schedule rather than by a stronger drug.
You reach this column when: The area is too large to cover consistently, scale persists after four weeks, or it returns within weeks despite genuine intermittent use.
- Prescription oral
A short oral course, with the topical continuing
Why this step sits here: Systemic treatment solves the coverage problem that defeats topicals across a whole back. It is deliberately short and deliberately handed back to a topical afterwards, because repeated oral courses are a pattern to avoid rather than a plan to settle into.
Within this step the choice between the two oral agents is made on fit rather than on strength, and both are supported by the same systematic review:
- Itraconazole, given as a short daily course backed by large randomized trials
It concentrates in sebum and keratin, which suits extensive truncal disease and is also the agent with the intermittent prophylaxis trial behind it, so it fits where prevention is already the second half of the conversation.
- Fluconazole, given on a weekly rhythm backed by large randomized trials
A weekly schedule suits someone who will not manage a daily course, and its different interaction profile matters where the itraconazole list collides with medicines already being taken.
When to move up
- A fair trial
- The prescribed course followed by several weeks of observation, judged on whether scaling has stopped across the whole area rather than in the parts easiest to see.
- Improvement looks like
- The trunk stops shedding scale, patch edges stop moving, and the interval before anything reappears lengthens.
- Move up if
- The pattern of relapse has not changed, or repeat oral courses are being asked for more than occasionally.
→ The next step up this pathway.
-
- Specialist care
Scheduled prevention, and looking for the reason
Why this step sits here: For anyone into a third or fourth annual round, the highest-value step is no longer a stronger course. A scheduled preventive regimen has trial evidence behind it, and confirming the organism on scale settles whether every one of those rounds was aimed at the right target.
Two things are worth raising explicitly at this stage: whether a preventive schedule timed to the months that trigger it would suit better than another course each summer, and whether anything in the wider picture — corticosteroid treatment, immunosuppression, a job or sport that keeps skin damp for hours — is doing more to drive the pattern than the choice of antifungal ever will.
Living with a condition that recurs by design
Success on this route is not a permanently clear back, and framing it that way sets up a disappointment on a two-year timetable. The organism stays; what changes is whether it is held below the level at which it produces patches. That is a schedule rather than a cure — an intermittent wash through the warm months, stepped up a few weeks before whichever season reliably sets things off, and a preventive course agreed in advance where relapse has been frequent enough to justify one. Judged against that goal rather than against permanence, most people do well.
Treated, and the colour has not come back
Smooth, non-scaling patches that are still lighter or darker than the skin around them, weeks or months after a course that appeared to work. This is the situation that generates most of the repeat treatment in this condition and almost none of the benefit, because there is nothing left in the skin for an antifungal to act on.
You reach this column when: Scale returns, patches start spreading again, or after several months the colour has not shifted at all.
- Specialist care
Checking whether anything is still there
Why this step sits here: Where colour has not moved in months, the question is diagnostic rather than therapeutic. Microscopy of scale distinguishes a persisting infection from a cured one, and a lamp and hand lens help separate residual hypopigmentation from vitiligo, pityriasis alba and marks left by an earlier rash — all of which are managed differently and none of which answers to an antifungal.
The most useful sentence to bring to this appointment is how long ago treatment finished and whether the surface has shed any scale since. That single piece of history distinguishes the two possibilities faster than anything visible, and it is the detail most often left out because it seems less important than the colour itself.
Tinea versicolor (pityriasis versicolor): the full therapy pathway · dermapproved.com/treatments/tinea-versicolor/ · not a diagnosis — confirm anything you act on with a clinician
When the rules change
Three groups sit slightly outside the main routes, and in each the plan changes for a different reason — what may be used, how likely it is to recur, and how the result is read.
During pregnancy and breastfeeding
Pregnancy removes the oral tier and leaves the topical one doing all the work, which suits this condition better than it suits most — topical treatment is first-line here anyway, and the recovery half needs no drug at all.
What can be used
- Topical clotrimazole cream, among the better-documented antifungals in pregnancy and frequently the preferred choice
- Ketoconazole shampoo used on the affected skin, widely used with minimal absorption through intact skin
- Sun protection through the recovery months, which carries the second half of the result and no pregnancy considerations at all
- Plain emollients on skin dried out by a medicated wash
What comes off the table
- Oral antifungals of any kind, which are set aside during pregnancy and when pregnancy is being planned
- Selenium sulfide, the topical option most commonly avoided in pregnancy
- Intermittent oral prophylaxis, which is a preventive convenience rather than a necessary treatment
None of the topical products carries a licence for this use in pregnancy, so what looks like a settled list is in practice a conversation with whoever is providing antenatal care. Hormonal change is itself among the recognised associations, which is one reason the condition sometimes first appears during a pregnancy.
Immunosuppression and long-term corticosteroids
Suppressed immunity, corticosteroid treatment and raised cortisol all appear among the recognised predisposing factors, and the practical consequence is more skin involved and a shorter interval before it returns.
What can be used
- The full topical tier, which remains first-line and is often used over a wider area than usual
- Oral courses, which come into the conversation earlier here than in an otherwise healthy adult
- Scheduled prevention rather than repeated reactive courses, where the pattern is frequent
- Confirmation on scale, which is worth more in this group because other opportunistic skin conditions share the territory
What comes off the table
- A four-week home trial as the opening move where involvement is extensive
- Assuming a poor response means the antifungal was too weak rather than that something else is present
Whether the immunosuppression is treatable is a separate and usually more important question than which antifungal is used, and it belongs with the clinician managing it rather than on a skin page.
Where the colour contrast is stark
The infection and its treatment are identical regardless of skin tone. What differs is how visible the aftermath is and how long it stays visible, which changes the psychology of the recovery phase more than its pharmacology.
What can be used
- Exactly the same antifungal options, at the same strengths, for the same duration
- Sun protection, which does proportionally more here because the surrounding skin has more capacity to darken away from the patches
- Photographs at fixed intervals, which are the honest measure when a slow change is also a conspicuous one
- A clinician's confirmation where months pass without movement, since post-inflammatory hypopigmentation and vitiligo both need to be excluded rather than assumed
What comes off the table
- Repeat antifungal courses aimed at colour on skin that is smooth and shedding nothing
- Products marketed for uneven tone, which are formulated to reduce pigment rather than restore it
The practical risk in this group is not undertreatment of the infection but overtreatment of its shadow, and the scale test is what keeps the two apart.
How an appointment actually happens, what to take to it, and how to keep your skin liveable while a prescription or procedure does its work.
What seeing a dermatologist actually looks like
Most limited cases are handled without an appointment, because the effective treatments sit on a pharmacy shelf in every market. The reasons to see someone are mainly diagnostic: confirming that scaling patches are what they appear to be when a full course has not shifted them, establishing whether anything is still growing when colour has not returned for months, and separating this from the several other causes of pale patches on a trunk. In most systems that starts with a family doctor, who can prescribe both topical and oral antifungals; a dermatology referral is for diagnostic uncertainty, for extensive or resistant disease, and for immunosuppression. Examining scale under a microscope takes a few minutes where the equipment is on site and is worth asking for by name, because in practice it is frequently skipped.
What to bring
- Dated photographs of the area, particularly of a back that cannot be assessed by eye
- Exactly which product was used, over how much skin, for how many weeks, and how long it stayed on before rinsing
- Whether the surface has shed any scale since the course finished, which is the detail that separates the two possibilities fastest
- The history of episodes by month or season, since a preventive plan is timed against that pattern
- A current medicines list, which matters because oral antifungals interact with a long list of common drugs
Questions worth asking
- Can scale be examined under a microscope today to confirm whether anything is still growing?
- Is the remaining discolouration consistent with recovery after treatment, or with something else?
- Given how much skin is involved, is a topical realistic here or is a short oral course more sensible?
- Would a scheduled preventive regimen suit this pattern better than treating each episode?
- How long would repigmentation reasonably be expected to take in this case?
- If an oral agent is used, which one fits alongside the medicines already being taken?
Cost and access. Treatment is inexpensive almost everywhere. A medicated anti-dandruff shampoo used on the body costs a few pounds or dollars and covers a trunk many times over, and generic antifungal creams are similarly cheap. Prescription-strength topicals cost more without changing the timetable for colour. Oral antifungals are generic and inexpensive in most systems, though the appointment and the interaction review around them are the parts that take time. The largest avoidable expense reported in this condition is repeat treatment of skin that has already been cured, closely followed by pigment-correcting products bought for patches that have no excess pigment in them.
A family doctor can diagnose and manage this, including prescribing oral antifungals where the extent justifies one. Asking specifically for microscopy is reasonable whenever a full course has not worked or colour has not recovered, and it is the step most often left out. A dermatology referral is reasonable for diagnostic uncertainty, for disease that has resisted a properly applied prescription topical, and where immunosuppression is part of the background.
Finding someone to see
How a clinician is reached differs by country, and for this condition the first appointment is almost always with a family doctor rather than a specialist.
- US Find a Dermatologist American Academy of Dermatology Searchable by location and by condition; all listings are board-certified.
- Canada Find a Dermatologist Canadian Dermatology Association Certified dermatologists by city or postal code; a family doctor's referral is normally needed to book.
- UK Pityriasis versicolor — NHS overview NHS Covers what the condition is, the antifungal shampoo and cream route, and when a GP appointment is warranted.
- Australia Pityriasis versicolor — A to Z of Skin Australasian College of Dermatologists The specialist college's own patient information entry for this condition.
A country appears here only where a national directory or health service page could be checked directly. A gap means the source could not be confirmed, not that care is unavailable there.
Skincare alongside therapy
Supporting care around this condition has two distinct jobs separated by several weeks. During treatment it keeps a drying medicated product tolerable across a large area. Afterwards it does something more important — it protects skin that is quietly rebuilding its pigment, over a period long enough that most people stop thinking about it.
The organising idea is that the recovery phase is a photoprotection problem, not a skincare problem. Nothing applied to a hypopigmented patch makes it produce pigment faster, and the products marketed for uneven skin tone are built to remove excess pigment rather than restore missing pigment. What genuinely shortens the visible phase is preventing the surrounding skin from pulling further ahead.
While the antifungal course is running
The main risk over these two weeks is not the infection but the treatment: a medicated wash across a whole trunk is drying, and dry flaking skin is easy to mistake for the condition continuing. Keeping those apart is most of the job.
Do
- Cover the whole region and a margin of normal-looking skin, not only the patches that are visible
- Leave a medicated wash on the skin for several minutes before rinsing it off
- Follow with a plain moisturiser on any area that becomes tight or flaky
- Take a dated photograph in even indirect light at the start of the course
Avoid
- Scrubbing or exfoliating the patches, which irritates skin without reducing the organism
- Combination products that pair an antifungal with a topical steroid
- Judging progress by colour during a phase when colour cannot yet change
What that looks like on a shelf: a gentle cleanser, a barrier moisturizer.
Through the months while colour returns
This is the longest phase and the one with no medicine in it. The work is protecting a large area consistently for long enough that the difference closes, which is a habit problem rather than a product problem.
Do
- Apply broad-spectrum sun protection over the whole affected region on any day with meaningful sun exposure
- Use clothing on days involving water, sport or long hours outdoors, where reapplication is unrealistic
- Keep skin comfortable with a plain emollient so the area is not itchy enough to invite scratching
- Re-photograph every four weeks and compare against the image rather than against memory
Avoid
- Deliberate sun exposure intended to blend the patches into the surrounding skin
- Brightening or pigment-correcting products bought for pale patches, which target the opposite problem
- Restarting antifungal treatment on colour alone, with no scale present
What that looks like on a shelf: a daily sunscreen, an emollient for everywhere.
Around prevention and around treatment by mouth
Where the pattern is annual, the useful supporting work is scheduling rather than soothing — and where a course of tablets is involved, it is making sure that course is the last one for a long time.
Do
- Give the prescriber a full list of other medicines before an oral course, since these agents interact widely
- Keep an intermittent topical schedule running after a systemic course rather than stopping at clearance
- Move the schedule earlier in the year than instinct suggests, ahead of the months that usually trigger it
- Note the dates of each episode somewhere, because the pattern is what a preventive plan is timed against
Avoid
- Treating repeated courses each season as a prevention strategy
- Stopping topical treatment on the basis that the tablets are the real treatment
- Expecting prevention to do anything about discolouration that is already present
What that looks like on a shelf: a barrier moisturizer, a daily sunscreen.
The supporting shelf
A gentle cleanser
A barrier moisturizer
A daily sunscreen
An emollient for everywhere
The roles named above resolve to whichever products currently grade best for that job in our catalog. For this condition the category carrying most of the long-run work is sun protection, chosen for how comfortable it is over a large area rather than for anything in the filter list — a fluid that gets applied to a back beats a better formula that stays in the cupboard.
Every therapy named above, in full. Look things up here; it is not meant to be read end to end.
Every therapy, explained
Reference, not reading — every therapy named anywhere above, described the way a clinician would describe it. Nobody reads this section end to end; open the one you were sent here for. Which one is right for you is the appointment's job, not this page's.
Over the counter
Available without a prescription. Each one opens with what to look for on a label, which is the part that stays true regardless of which brand is on the shelf that month.
Over-the-counter Medicated antifungal washes
Over-the-counter antifungal shampoos used on the body
Individualized — ask a clinician
Medicated antifungal washes
Over-the-counter antifungal shampoos used on the body
The practical first-line treatment for anything beyond a couple of patches, because a shampoo spreads over a large area in the shower in a way a cream never will.
At the shelf
Ketoconazole, selenium sulfide or zinc pyrithione on the front of an anti-dandruff bottle, in the haircare aisle rather than the skincare one.
The active is what is being bought and the brand is not. Strengths differ by market and by legal category: ketoconazole is sold at 1% over the counter in the United States and at 2% under a UK pharmacy or prescription licence, and selenium sulfide is 1% over the counter against 2.5% on prescription in the United States. Plain medicated versions are preferable to conditioning variants with added oils. A bottle covers a whole trunk many times over, which is why this is one of the least expensive treatments described anywhere on this site.
Watch out for: Anything sold as a specialist body wash for discoloured skin at a skincare price. The effective ingredient in it is on the dandruff shelf for a fraction of the money.
Browse all ketoconazole products in our catalog →
How it works
Ketoconazole blocks the fungal enzyme that builds ergosterol, the sterol its cell membrane depends on, and the membrane fails without it. Selenium sulfide and zinc pyrithione act less specifically, disrupting the yeast's metabolism and its ability to divide. All three reduce the population living in the stratum corneum; none of them touches pigment.
What the evidence says strong
Topical antifungals are first-line therapy in every published account of this condition, and the systematic review of interventions found consistent mycological cure with topical azoles across the trial literature. Selenium sulfide and zinc pyrithione sit a step below the azoles on evidence quality rather than on availability.
Typical course
A short daily course measured in days to a couple of weeks, applied over the whole affected region and left on the skin for several minutes before rinsing, then dropped to an intermittent schedule if the condition has a habit of returning.
Commonly discussed side effects
- Dryness and tightness across the treated area, most noticeably with selenium sulfide
- Stinging on skin that is already irritated or sun-damaged
- Selenium sulfide can discolour pale or dyed hair and tarnish jewellery
- A persistent sulphurous smell with some formulations
Worth knowing
- Treating only the visible patches leaves the surrounding colonised skin untouched, which is a common reason it reappears within weeks in the gaps
- Rinsing immediately after lathering wastes most of the dose — the minutes on the skin are what the trials were measuring
- In the United States these products are labelled for dandruff and seborrhoeic dermatitis, so use on the trunk for this condition is off-label even though it is standard practice
Pregnancy: Topical ketoconazole is poorly absorbed and is commonly regarded as acceptable during pregnancy where treatment is warranted, while selenium sulfide is the one most often set aside. Since none of these products carries a pregnancy-specific licence for this use, the decision sits with whoever is providing antenatal care rather than with a label.
Why it sits where it does: It leads the over-the-counter rung because it is the only format that covers a whole trunk in the time anyone will actually spend, and because the same bottle then serves as the intermittent maintenance that decides whether next summer looks like this one.
Over-the-counter Over-the-counter antifungal creams
Pharmacy azole and allylamine creams
Individualized — ask a clinician
Over-the-counter antifungal creams
Pharmacy azole and allylamine creams
The option for a handful of patches over one area, where precise application to defined skin is easy and a shower-based treatment is overkill.
At the shelf
Clotrimazole 1%, miconazole 2% or terbinafine 1% cream — the ordinary athlete's foot and jock itch shelf, in a tube rather than a bottle.
These are the agents with the cleanest comparative trials behind them, and a randomised comparison of terbinafine 1% cream against ketoconazole 2% cream found cure rates within a few percentage points of each other at two weeks and again at eight. Cream suits a small number of defined patches; it becomes unrealistic across a whole back, where a wash is the sensible format. Generic tubes and branded ones contain the same active at the same strength.
Watch out for: Combination products pairing an antifungal with a steroid. The steroid is there for other conditions, it does nothing useful here, and on this condition it can make matters worse rather than better.
How it works
Clotrimazole and miconazole are azoles and interrupt ergosterol synthesis in the same way ketoconazole does. Terbinafine is an allylamine and blocks the same pathway at an earlier step, which is why it works well on the skin surface even though the tablet form of the same drug does not work on this organism at all.
What the evidence says strong
Topical azoles and terbinafine both carry the strongest grade of recommendation in the published treatment literature for this condition, supported by randomised comparative trials showing equivalence between them at two-week and eight-week assessment.
Typical course
Once or twice daily over the affected skin and a margin of normal skin around it, for roughly two weeks, continued for the full course rather than stopped when the surface stops flaking.
Commonly discussed side effects
- Mild stinging or redness on application
- Occasional contact allergy to a cream base rather than to the active
- Impractical greasiness when a large area is covered
Worth knowing
- In the United States these products are labelled for athlete's foot, jock itch and ringworm, so this use is off-label despite being well supported by trials
- A tube runs out long before a whole trunk has been treated properly, and a half-covered course is the usual reason a limited case behaves like a stubborn one
- Any product pairing an antifungal with a topical steroid is the wrong purchase for this
Pregnancy: Topical clotrimazole is among the more reassuringly documented antifungals in pregnancy and is frequently the preferred choice when treatment is needed; terbinafine has less data behind it. Because oral therapy is set aside during pregnancy, a topical carries more of the work than usual, and the choice belongs with the clinician managing the pregnancy.
Why it sits where it does: It shares the first rung with the washes rather than sitting below them, because the choice between cream and shampoo is about how much skin is involved rather than about how strong the treatment needs to be.
Over-the-counter Protecting the recovering skin
Photoprotection during pigment recovery
Generally compatible
Protecting the recovering skin
Photoprotection during pigment recovery
The second half of treatment, and the half with no antifungal in it — what shortens the period during which a cured infection still looks like an active one.
At the shelf
A broad-spectrum sunscreen comfortable enough to go on a whole torso, plus a shirt for the days when reapplication is not going to happen.
Format matters more than filter chemistry for this job, because the area needing cover is large and the habit has to last for months rather than a fortnight. A fluid or spray that gets applied over a back beats a superior formula that stays in the drawer. Clothing is the most reliable option of all on the days that involve water, sport or long hours outdoors, and it needs no reapplication.
Watch out for: Brightening or pigment-correcting serums bought for the pale patches. They are built to lift excess pigment, which is the opposite of the problem in hypopigmented skin, and they do nothing to bring colour back.
How it works
Melanocytes in the affected skin have been suppressed and take weeks to months to resume normal output. Sun exposure meanwhile stimulates pigment production in the surrounding unaffected skin, so an afternoon outdoors darkens the background faster than the patches can recover, and the visible contrast widens even though the infection is gone.
What the evidence says well established
Approved labelling for ketoconazole shampoo states directly that pigment normalisation after successful therapy is variable, may take months, and depends on skin type and incidental sun exposure. That the surrounding skin tans while the affected skin does not is the mechanism behind the second half of that sentence.
Typical course
For as long as the colour difference is visible, which commonly means the rest of the season and often several months beyond it.
Commonly discussed side effects
- Nothing beyond the usual tolerability questions of any sunscreen on a large area
- Cost and effort, both of which are real when the area is a whole back
Worth knowing
- Deliberate tanning to blend the patches in does the reverse, because the affected skin cannot tan and the surrounding skin can
- This is not a treatment for the infection and does not replace one while scale is still present
Pregnancy: Sun protection carries no pregnancy considerations and becomes proportionally more useful during pregnancy, when the antifungal options are narrower and the pigment half of the problem is doing more of the visible work.
Why it sits where it does: It sits on the first rung of every route including the one where no infection remains, because it is the only intervention that continues to be worth anything after the yeast has gone.
Browse the whole catalog for this condition:
What changed recently: Very little has changed in the pharmacology and that is worth saying plainly rather than dressing up: the agents used today are the ones used thirty years ago, all long off patent. What has moved is the evidence around them. Systematic reviews published since 2010 pulled the scattered trial literature into something comparable for the first time, and a 2025 analysis of more than thirty thousand insured patients gave the first large-scale picture of who actually gets this and how it is managed in practice. The commercial pipeline, meanwhile, is empty, for reasons that have nothing to do with how well the condition is treated.
Prescriptions and procedures
About the brand names below. Treatment here is bought by active ingredient rather than by brand, and the generic and the branded tube contain the same drug at the same strength. What genuinely differs between countries is legal category — the same product is a supermarket purchase in one market and a prescription in another. Where a region is absent below, that reflects what could be confirmed rather than proof of absence.
The labels linked below are national medicines sources rather than manufacturer pages. Two things are worth noticing while reading them: ketoconazole is one of the few agents whose approved labelling names this condition directly, and the legal category of the same strength differs between countries, so a label describing a prescription product in one market may describe a pharmacy purchase in another.
Prescription topical Prescription topical antifungals
Higher-strength azoles, ciclopirox and selenium sulfide
Individualized — ask a clinician
Prescription topical antifungals
Higher-strength azoles, ciclopirox and selenium sulfide
The same idea as the pharmacy shelf at a strength and in vehicles a prescriber chooses, and the tier where the labelling finally names the condition being treated.
- Ketoconazole 2% cream or shampoo — Approved in the United States for the treatment of tinea (pityriasis) versicolor; the same strength is a pharmacy or prescription product in the United Kingdom depending on the licence.
- Ciclopirox cream, lotion or shampoo — A different mechanism from the azoles, with antifungal and anti-inflammatory activity against Malassezia.
- Econazole, oxiconazole, bifonazole — Further topical azoles with supporting trials; availability differs considerably between markets.
- Selenium sulfide 2.5% suspension — The prescription strength in the United States, above the 1% sold over the counter.
What it's called at the pharmacy
Generic names Ketoconazole 2% cream or shampoo · Ciclopirox cream, lotion or shampoo · Econazole, oxiconazole, bifonazole · Selenium sulfide 2.5% suspension
Sold as
- Ketoconazole 2% cream and 2% shampoo are prescription; the 1% shampoo is sold over the counter
- Selenium sulfide 2.5% lotion is prescription; 1% is over the counter
- Ketoconazole 2% shampoo is licensed for pityriasis versicolor, with individual licences differing in whether the product is supplied from a pharmacy or on prescription
Legal category varies more than usual for this class — the same strength of the same drug sits on a supermarket shelf in one country and behind a prescription in another. A region is listed only where the position could be confirmed.
Read the label
- Ketoconazole shampoo 2% — prescribing information DailyMed, U.S. National Library of Medicine
- Ketoconazole 2% shampoo — summary of product characteristics electronic medicines compendium (UK)
How it works
Higher-concentration azoles work by the same ergosterol blockade with more drug arriving. Ciclopirox acts differently, binding the metal ions several fungal enzymes need, which makes it a genuine alternative rather than a stronger version of the same approach.
What the evidence says strong
Prescription-strength topical azoles carry the strongest recommendation grade in the treatment literature, and ketoconazole 2% is the agent whose approved labelling in the United States names this condition specifically. Comparative trials place terbinafine and ketoconazole close together on cure rates.
Typical course
A short course over one to three weeks depending on the agent and the vehicle, with an intermittent schedule discussed afterwards where relapse has been the pattern.
Commonly discussed side effects
- Local irritation, dryness and burning
- Contact allergy, uncommonly
- Ketoconazole 2% cream formulations may contain sulfite, which matters for the small group sensitive to it
Worth knowing
- Where an over-the-counter product appeared to fail, the application technique is worth reviewing before the strength is blamed — under-covered skin and a rushed rinse account for most apparent failures
- None of these repigments anything, so a prescription changes how quickly the infection clears and not how quickly the colour returns
Pregnancy: Topical azoles are absorbed minimally and are often considered usable in pregnancy when treatment is needed; ciclopirox has a thinner safety record and selenium sulfide is generally set aside. This is a prescriber's decision taken alongside antenatal care rather than a rule that can be read off a page.
Why it sits where it does: It sits one step above the pharmacy tier as an incremental move rather than a new idea. The meaningful jump in this condition is from topical to oral, which is about covering skin rather than about killing yeast harder.
Prescription oral Oral antifungals
Systemic azoles
Avoid in pregnancy
Oral antifungals
Systemic azoles
A short course of tablets for disease too widespread to cover reliably with a topical, for cases that have genuinely resisted one, and for people who would simply not complete two weeks of whole-body application.
- Itraconazole — Concentrates in sebum and keratin, which is precisely where this organism lives.
- Fluconazole — An alternative given on a weekly rhythm, with a different interaction and tolerability profile.
What it's called at the pharmacy
Generic names Itraconazole · Fluconazole
Sold as
- Itraconazole and fluconazole are both supplied as generics and under a number of trade names. Use for this condition is off-label in many markets, where the licence covers other fungal infections
Off-label prescribing is ordinary and lawful. It does mean the leaflet inside the box will describe infections other than the one being treated.
How it works
The same ergosterol blockade as the topical azoles, delivered systemically so that the drug reaches the stratum corneum through sebum and sweat rather than being spread onto it. Itraconazole's affinity for sebum and keratin is the specific reason it is favoured for this organism.
What the evidence says strong
A systematic review of systemic treatments found the literature supports short itraconazole courses and weekly fluconazole regimens, and a double-blind trial found single-dose oral fluconazole and two weeks of topical clotrimazole produced complete cure rates that did not differ significantly at twelve weeks.
Typical course
A course measured in days rather than weeks, usually with topical treatment continuing alongside it and afterwards.
Commonly discussed side effects
- Nausea, abdominal discomfort and headache
- Raised liver enzymes
- Itraconazole carries a boxed warning about negative inotropic effects and heart failure
- Both interact with a long list of commonly prescribed medicines
Monitoring
A prescriber reviews interacting medicines before starting, and checks liver function where a course is prolonged or where liver disease is already present.
Worth knowing
- Oral terbinafine and griseofulvin do not work against this organism, which surprises people who have used terbinafine successfully for a nail or a foot
- Oral ketoconazole is no longer recommended for superficial fungal infections by the United States and Canadian regulators where less hepatotoxic alternatives exist
- Sweating shortly after a dose has been described as helping the drug reach the skin, which is a reason to ask the prescriber about timing rather than to improvise
Pregnancy: Oral azole antifungals are generally avoided in pregnancy, particularly during the first trimester. Where treatment is needed the plan stays topical, and the specifics belong with the obstetric team rather than with a general rule.
Why it sits where it does: It sits above the topicals because it solves a coverage problem rather than a potency one, and accepting systemic exposure and an interaction check is a real trade — proportionate for a whole trunk, and not for four patches on a shoulder.
Prescription oral Intermittent prophylaxis
Scheduled prevention for frequent relapse
Avoid in pregnancy
Intermittent prophylaxis
Scheduled prevention for frequent relapse
The answer to a condition that returns every year rather than to one that is present now — a schedule agreed in advance instead of another course started in July.
- Intermittent oral itraconazole — Given as a single short monthly course over about half a year, rather than continuously.
- Intermittent topical antifungal — The same wash used weekly to monthly, which is the version most people can run themselves indefinitely.
How it works
Nothing eradicates the organism, because it is a normal inhabitant of adult skin. Prophylaxis keeps the population below the threshold at which it converts to the filament-forming state, which is why it is timed against the conditions that trigger that conversion rather than against symptoms.
What the evidence says strong
In a double-blind placebo-controlled trial of intermittent oral prophylaxis after successful treatment, 88 per cent of those on active prophylaxis remained mycologically negative at the end of six months, against 57 per cent on placebo. Topical prophylaxis is used far more widely and rests on weaker formal evidence.
Typical course
Scheduled rather than continuous, over roughly six months for the oral version, and open-ended for the topical one.
Commonly discussed side effects
- The same profile as any oral azole course, spread across fewer days
- Drug interactions remain the practical constraint even on an intermittent schedule
- Topical prophylaxis is limited to dryness and the smell of the product
Monitoring
Interacting medicines are reviewed before an intermittent oral schedule starts, in the same way they would be before a treatment course.
Worth knowing
- Repeated treatment courses started each time the patches reappear are not prophylaxis, and the difference is the whole point of this card
- Prophylaxis prevents the infection returning; it does nothing about discolouration already present
Pregnancy: Oral prophylaxis is not appropriate during pregnancy or when pregnancy is being planned. An intermittent topical schedule is the option that remains available, agreed with whoever is providing antenatal care.
Why it sits where it does: It sits at the top of the recurrent route rather than the extensive one, because relapse and severity are different problems and answering a yearly return with a stronger course each year is answering the wrong question.
Procedure Confirming what the patches are
Wood lamp, microscopy and dermoscopy
Generally compatible
Confirming what the patches are
Wood lamp, microscopy and dermoscopy
The step that matters most for skin that has already been treated — the point where the useful question stops being which antifungal and becomes whether there is anything left to treat.
- Wood lamp examination — Affected skin can fluoresce yellow-green or gold, though only about a third of cases show it.
- Potassium hydroxide microscopy — Scale from a patch shows the short hyphae and clustered yeast cells described as a spaghetti-and-meatballs pattern.
- Dermoscopy — A hand lens shows fine white scale sitting in the skin furrows with sharply demarcated edges.
How it works
Microscopy shows whether organisms are still present, which separates a genuinely uncured infection from a cured one whose colour has not returned. The Wood lamp and dermoscopy add pattern information quickly, and the lamp also distinguishes the coral-pink glow of erythrasma from the gold-green of this condition.
What the evidence says strong
Direct microscopy of scale is the practical diagnostic standard, with Wood lamp examination and dermoscopy described consistently as useful adjuncts rather than replacements. The limited sensitivity of the lamp — positive in roughly a third of cases — is why a negative one settles nothing.
Typical course
A single appointment. Where a microscope is on site, scraping and reading take a few minutes between them.
Commonly discussed side effects
- Scraping a patch is painless and leaves nothing behind
Worth knowing
- A negative Wood lamp does not rule this out, because most cases do not fluoresce at all
- Scale is needed for microscopy, so a smooth patch that has stopped shedding is often exactly the finding that answers the question
Pregnancy: None of these has any pregnancy implication, and confirmation is worth more than usual during pregnancy, when the treatment options are narrower and spending them on the wrong diagnosis costs more.
Why it sits where it does: It sits at the top of the pigment route and alongside the recurrent one, because both of those situations turn on a question a stronger prescription cannot answer.
On the horizon
Pipeline information current as of 2026-09-01
Only agents at phase 3, under regulatory review, or already approved appear here. Nothing currently meets that threshold for this condition, and the empty list is the honest finding rather than a section left unfinished.
This changes nothing about what to do now. Nothing in this section changes what is available or advisable today. It is here so that a reader knows what is moving, not so that anyone defers treatment waiting for it.
In late-stage development
The reason there is nothing to report is worth stating rather than hiding: every effective treatment for this condition is decades old and off patent, costs very little, and works. That removes the commercial reason to develop anything new. One oral agent reached mid-stage dose-finding work more than fifteen years ago and has not progressed to late-stage trials since. What the field actually lacks is not molecules but head-to-head trial evidence and a current guideline, and neither of those is something a company funds.
Things people arrive asking about
A condition with a slow-fading visible sign attracts a long tail of suggested remedies. Some have real trial evidence and a narrow place; some have evidence and a poor risk balance; some are simply popular. Placement here is honest rather than dismissive.
- Adapalene gel alongside an antifungal backed by smaller studies
Two randomised trials have tested adapalene here, one finding a combination with ketoconazole cream outperformed ketoconazole alone at four weeks. It is not an antifungal and the benefit is attributed to changes in the skin surface rather than to killing anything. A reasonable thing to ask a clinician about in stubborn cases, not a substitute for the antifungal itself.
- Sulfur and salicylic acid washes limited evidence
Old keratolytic preparations that predate the azoles and still appear in treatment lists. They do something, they are unpleasant to use over a large area, and they were largely superseded for good reason. Occasionally useful where the standard options are not tolerated.
- Lemongrass and other essential oils limited evidence
A small pilot study of a lemongrass oil formulation found improvement, but significantly fewer people achieved mycological cure than with ketoconazole cream in the same trial. The interesting finding is that it did anything at all; the useful conclusion is that the comparator won.
- Oral isotretinoin limited evidence
A single case report describes clearance during isotretinoin treatment given for acne, attributed to its effect on sebum. That is a curiosity rather than a rationale, and the drug's risk profile makes it indefensible as a treatment for this condition. Where someone is already taking it for acne, no additional treatment may be needed.
- Tanning to blend the patches in limited evidence
The most widely attempted self-remedy here and the one that reliably backfires. Recovering skin cannot produce pigment at its usual rate while the skin around it can, so the contrast widens. The labelling for the standard treatment names incidental sun exposure as a factor in how long normalisation takes, which is the same point.
- Antibacterial washes and bleach baths limited evidence
Borrowed from conditions where bacteria are the problem. This is a yeast, antibacterial measures do not address it, and the drying involved adds irritation to skin that is about to be treated with something drying. There is no trial evidence supporting either here.
Common questions
Is tinea versicolor contagious?
No. The organism behind it is already living on almost every adult trunk as ordinary resident flora, so there is nothing to catch and nothing to pass on. The approved labelling for ketoconazole shampoo states this directly, and adds the corollary that matters more day to day: because the organism is a normal inhabitant, the condition can recur even after successful treatment. Shared towels, swimming pools and close contact are not the reason it appeared.
Why are the patches still there weeks after treatment finished?
Because the infection and the discolouration end at different times. Antifungal treatment clears the yeast from the outer layer of skin within about two weeks, but the pigment-producing cells in the affected skin were suppressed and take weeks to months to resume normal output. What remains is a cured area that still looks affected. The check that separates the two is whether the surface sheds fine scale when scratched — smooth skin has nothing left to treat, whatever the colour suggests.
Should the affected areas be sunbathed to even the colour out?
That does the opposite of what it is intended to do. Recovering patches cannot yet produce pigment at their normal rate while the skin around them can, so an afternoon in the sun darkens the background and widens the difference. Approved labelling for ketoconazole shampoo notes that how quickly colour normalises depends partly on incidental sun exposure, which is the same fact stated more politely. Protection during the recovery months is what shortens the visible phase.
Can an ordinary anti-dandruff shampoo be used on the body for this?
That is essentially what the standard treatment is. Ketoconazole, selenium sulfide and zinc pyrithione are all sold as anti-dandruff products and all have supporting evidence in this condition, applied over the affected skin and left in place for several minutes rather than rinsed straight off. The one caveat is regulatory rather than clinical: in the United States these products are labelled for dandruff and seborrhoeic dermatitis, so using them on the trunk for this is off-label even though it is entirely standard practice.
Are the leftover terbinafine tablets from a nail infection any use here?
No, and the reason is a useful piece of pharmacology rather than a technicality. Terbinafine applied to the skin works well against this organism and has randomised trial evidence behind it, but the same drug taken by mouth does not, and neither does griseofulvin. The published treatment literature is explicit about the contrast. Beyond that, using leftover prescription antifungals is a poor idea for reasons unrelated to this condition.
Is it worth treating at all, given that it keeps coming back?
Yes, with the goal set correctly. Treatment reliably clears the infection and stops the patches spreading, and the earlier that happens the less skin has to repigment afterwards. What treatment cannot do is remove an organism that is part of normal skin flora, so recurrence within two years is reported in most people. The intervention that changes the long-run pattern is an intermittent schedule timed against whichever season triggers it — not a stronger course each time.
Do the pale patches ever become permanent?
In the great majority of cases the colour returns, though the timetable is measured in months rather than weeks and runs longer where the contrast with surrounding skin is starker. Where several months have passed with no movement at all, the useful step is not more treatment but a look at whether the patches are actually residual hypopigmentation — vitiligo, pityriasis alba and marks left by an earlier rash all produce pale skin and are managed on completely different routes.
Sources and further reading
The staging, escalation points, and therapy descriptions on this page are anchored to published clinical guidelines rather than editorial judgment.
What this page is built on
The studies behind this pathway
The studies and documents this page leans on, with the part of the page each supports. Where a citation carries no link, the reference is given in full so it can be found directly rather than attached to a guessed identifier.
- Guidelines of care for superficial mycotic infections of the skin: Pityriasis (tinea) versicolor The structure of the ladder from topical to oral therapy, and the only condition-specific guideline anchoring this page.
- Pityriasis versicolor: a systematic review of interventions The comparative standing of the topical agents on the over-the-counter rung, and the evidence gaps between them.
- Systematic review of systemic treatments for tinea versicolor and evidence-based dosing regimen recommendations How oral courses are structured, and the finding that oral terbinafine and griseofulvin do not work here.
- Efficacy of itraconazole in the prophylactic treatment of pityriasis (tinea) versicolor The intermittent prophylaxis card, including the placebo-controlled comparison at six months.
- Terbinafin 1% Cream and Ketoconazole 2% Cream in the Treatment of Pityriasis Versicolor: A randomized comparative clinical trial The equivalence between the pharmacy-shelf allylamine and the prescription-strength azole on the first two rungs.
- Single-dose oral fluconazole versus topical clotrimazole in patients with pityriasis versicolor: A double-blind randomized controlled trial The argument that oral therapy solves a coverage problem rather than a potency one.
- Pityriasis Versicolor-A Narrative Review on the Diagnosis and Management The diagnostic section, including the limited sensitivity of Wood lamp examination and the role of dermoscopy.
- Antifungal Treatment for Pityriasis Versicolor The relative standing of azoles, allylamines and the non-specific agents used as medicated washes.
- Tinea versicolor: an updated review The account of pigment change, the predisposing factors, and the age distribution described in the staging section.
- Malassezia: A Commensal, Pathogen, and Mutualist of Human and Animal Skin The description of the organism as normal resident flora and the lipid dependence behind its distribution.
- A randomized controlled trial of combination treatment with ketoconazole 2% cream and adapalene 0.1% gel in pityriasis versicolor The adapalene entry in the lower-evidence section.
- Pityriasis versicolor epidemiology, disease predictors, and health care utilization: Analysis of 32,679 cases in a large commercial insurance database The claim that the recent movement in this field has been in evidence and epidemiology rather than in new agents.
Everything on this page traces to the sources below, and one caveat belongs at the top. The only guideline written specifically for this condition is thirty years old, so current practice rests on systematic reviews, on approved product labelling, and on national health service guidance rather than on a modern consensus document.
The guideline, and its age
Published in 1996 and never revised. It remains the only condition-specific guidance from a major dermatology body, which is a real gap rather than a sign that nothing has changed.
- Guidelines of care for superficial mycotic infections of the skin: Pityriasis (tinea) versicolor American Academy of Dermatology, Guidelines/Outcomes Committee The 1996 guidance, cited here for the structure of the treatment ladder rather than for current agent availability.
Systematic reviews and current summaries
Where the evidence behind each agent has actually been assembled and compared.
- Pityriasis versicolor: a systematic review of interventions Archives of Dermatology The most complete comparison of topical and oral options across the trial literature.
- Systematic review of systemic treatments for tinea versicolor and evidence-based dosing regimen recommendations Journal of Cutaneous Medicine and Surgery The basis for how oral courses are structured, and for which agents are not effective.
- Pityriasis Versicolor-A Narrative Review on the Diagnosis and Management Life A recent overview covering diagnosis, the pigment changes, and treatment.
Patient-facing national guidance
Written for readers rather than clinicians, and useful for how the condition is described in a consultation.
- Pityriasis versicolor NHS Includes the plain statement that skin can take a few months to return to its usual colour after treatment.
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