Papules, Scales, Plaques and Eruptions

A common skin disease with small itchy spots on the legs or arms that are usually pink or purple.

The lesions are typically polygonal, flat (hence, the term planus), and pruritic (itchy). Occurs characteristically on the wrists, shins, lower back and genitalia. If the scalp is involved, hair loss may occur.

The cause(s) of lichen planus are unknown. However, certain drugs can trigger the conditions (thiazide diuretics, phenothiazines, antimalarials).

Topical corticosteroids are used for treatment. In most cases, the disease spontaneously regresses 6 months to 2 years after onset.