Teledermatology Is Excellent at Half of Dermatology

The line runs through your problem, not through the technology

The standard framing treats remote dermatology as a compromised version of the real thing, tolerable when the alternative is a long wait. That framing is wrong in both directions: it undersells what remote care does well and it obscures the specific places where it fails badly.

The evidence for the first half is unusually good. A randomised clinical trial published in JAMA Network Open compared an online model against in-person care for adults with psoriasis and found the online route delivered comparable disease-control outcomes; a further randomised trial in the Journal of the American Academy of Dermatology examined functional and psychological outcomes in the same population and reached compatible conclusions. Atopic dermatitis has been tested the same way, with a randomised trial of direct-access online care examining patient quality of life. These are not satisfaction surveys. They are trials with clinical endpoints, and they say that for a diagnosed inflammatory condition being managed over time, the room is not doing as much work as people assume.

What the room is doing is a different set of things entirely — and those things do not appear in a psoriasis follow-up because they were already done at the first visit.

What the camera delivers, and what it silently drops

A photograph is a very good instrument for two properties and a poor one for everything else.

Colour transmits well. Distribution transmits well — where lesions sit, whether they are symmetrical, whether they follow flexures or extensor surfaces or a dermatomal line, which is often the single most diagnostically loaded piece of information available. Morphology transmits adequately at close range with adequate light.

What does not survive the trip is anything that requires a hand. Induration — whether a plaque is thickened, and how deeply — is a palpation finding. So is whether a nodule is fixed or mobile, tender or not, fluctuant or solid, warm or cool. Scale adherence, the difference between something that flakes off and something bonded down, is felt rather than seen. Depth is nearly impossible to judge in two dimensions. And dermoscopy is not a photography problem at all: it needs a contact optic pressed against skin with the correct polarisation, which a phone camera cannot approximate no matter how many megapixels it has.

This is why image quality is the rate-limiting factor in almost every disappointing remote consult. The fix is procedural rather than technical: natural indirect light rather than overhead bathroom lighting, one wide shot for distribution and one close shot for morphology, a consistent distance, something of known size in frame for scale, and no filters or auto-enhancement. Our photo-tracker tool exists to enforce that consistency, which also makes a series of photographs comparable over time rather than merely a collection of them.

Store-and-forward versus live video: different failures

The two dominant models are not interchangeable and it is worth knowing which one you are buying.

Store-and-forward means you submit images and a history, and a clinician reviews them asynchronously. Its advantage is image quality — photographs can be retaken until they are good, and the reviewer can zoom, compare and consult a colleague without a patient waiting on a call. Its weakness is that the history is whatever the form asked for. A question the form did not think to pose does not get asked, and a follow-up prompted by an answer cannot happen.

Live video inverts both. The conversation is real, so history-taking is adaptive and shared decision-making is possible, but the image is whatever a handheld camera and a home connection can manage in the moment — usually worse than a carefully taken still, sometimes much worse. A recent systematic review and meta-analysis of teledermatology's diagnostic accuracy across skin diseases found the modality performs respectably overall, and the sensible reading of that literature is that performance tracks the quality of what reaches the clinician rather than the label on the service.

The practical implication is a hybrid: prepare store-and-forward-quality photographs even for a live consult, and send them in advance if the platform allows it. That single step removes the most common cause of a wasted appointment.

Pigmented lesions are where to be inflexible

There is one category where the convenience calculation should not be run at all.

A systematic review in Cancers comparing teledermatology with face-to-face assessment for melanoma diagnosis lays out both the promise and the limits: teledermoscopy meaningfully improves remote assessment of a specific lesion, but it depends on dermoscopic images captured with proper equipment, not on a phone photograph of a mole. And even a well-imaged individual lesion is not the examination that matters most. A full skin check is a systematic survey of skin you cannot photograph well and in many cases cannot see — the scalp, the back, between toes, the posterior thighs — performed by someone who is comparing lesions against each other in real time and looking for the one that does not belong.

That comparison is the diagnostic act. It cannot be reconstructed from a submitted set of images, because the images you choose to submit are already filtered by what you noticed. The lesion that matters is frequently the one the patient did not photograph.

So the rule is simple and worth holding rigidly: a changing, new, bleeding, or asymmetric pigmented lesion is an in-person referral, and any personal or family history of melanoma, heavy sun damage, immunosuppression or a large number of atypical naevi means routine full skin checks belong in a room on a schedule. Our abcde-check tool is a triage aid for deciding how urgently to seek that appointment — it is explicitly not a diagnosis, and a reassuring result on a lesion that is genuinely changing should not slow you down.

Where remote care is genuinely the better option

Having drawn the line, it is worth being clear about how much sits on the good side of it.

Medication management is the strongest case. Titrating a topical, deciding whether a course has run long enough, adjusting a regimen that is half-working, reviewing bloods for a systemic agent, handling the routine checkpoints of a long treatment — none of these require touching skin, and all of them benefit from happening promptly rather than at the next available in-person slot. Follow-up cadence improves for the same reason, which matters disproportionately in conditions where the usual failure is abandonment before a treatment has declared itself. Access is the other half: for anyone rural, immobile, working inflexible hours, or facing a months-long wait, the realistic comparison is not remote versus in-person but remote versus nothing.

The caveat is about services rather than the modality. An audit of direct-to-consumer telemedicine platforms treating skin disease, published in JAMA Dermatology, found substantial variation in quality — including consultations where clinician identity and licensure were not disclosed, where relevant history was not collected, and where prescriptions were issued on thin information, with some diagnoses missed outright. The lesson is not to avoid remote care but to prefer a service connected to an actual dermatology practice, one that tells you who reviewed your case, and one that can escalate you to an in-person appointment rather than treating that as somebody else's problem.

Making the consult worth the slot

Remote or not, most of the value in a dermatology appointment is decided before it starts, and the preparation is identical either way.

Bring a timeline rather than a description of today. Bring the treatment history that matters — what you used, at what strength, how often, for how long, and why you stopped, because a treatment abandoned after four days and one that genuinely failed lead to opposite next steps. Bring the photographs, taken properly, ideally showing the condition at its worst rather than on the good day you happened to book. Bring your full product list, since contact reactions hide there. Our derm-visit-prep tool assembles all of that into something a clinician can read in the opening minutes.

Then there is the between-appointments half, which is where most of a chronic skin condition is actually managed. A remote consult that ends in a prescription still assumes a stable, unremarkable base underneath it — a plain emollient and a cleanser that are not themselves variables. ↗CeraVe Daily Moisturizing Lotion and ↗Lubriderm Advanced Therapy Moisturizing Lotion are the sort of unremarkable that this calls for, paired with something like ↗CeraVe Hydrating Cream-to-Foam Cleanser. Where scale is part of the picture, a keratolytic maintenance cream such as ↗CeraVe Psoriasis Moisturizing Cream does work between reviews, and daily sunscreen — ↗La Roche-Posay Anthelios Melt-In Milk is a reliable one — is the step that makes the next full skin check less eventful.

For the sequence a clinician is likely to work through, our ↗psoriasis and ↗eczema therapy pathways set out what typically has to be documented before moving up a rung — which is precisely the material that turns a fifteen-minute remote consult into a decision rather than a conversation.