Atrophic scars occur as depressed and well-defined lesions. They are usually caused by collagen destruction during the course of an inflammatory condition such as cystic acne or varicella.
These scars often have a sunken and pitted appearance. Scar formation is a necessary process for the healing of skin tissue after an injury. However, abnormal or disturbed collagen production can cause poor restoration of the cutaneous surface and texture irregularities. There are various factors that determine how your skin will scar, including depth and size of the wound, heredity, ethnicity and age.
Although scars are harmless, they are more susceptible to environmental factors such as sun damage.