These resolve and leave areas of hypopigmentation. Pityriasis alba has been regarded as a manifestation of atopic dermatitis. It is known to occur in nonatopic individuals. The lesions commonly are asymptomatic, though some patients will complain of burning or pruritus. Pityriasis alba affects all races but may be more prominent in dark-skinned patients.
Erythema later subsides completely.
At the stage when a physician commonly sees lesions, they show only persistent fine scaling and depigmentation. This commonly induces the patient to seek advice. It may be conspicuous in heavily pigmented skin. In lighter skins, it may become conspicuous after sun tanning. The course is extremely variable.