Perioral dermatitis in children.

Perioral dermatitis is a unique skin disorder of childhood. Its exact origin is unknown; it is probably an idiosyncratic response to exogenous factors such as the use of a topical fluorinated corticosteroid or other substances on the face. It is uncommon but not rare. The age of affected children has ranged from 7 months to 13 years, with the median being in the prepubertal period. Boys and girls, blacks and whites are equally affected. Clinical features include the following: (1) absence of systemic symptoms; (2) periorificial distribution (perioral, perinasal, periorbital); (3) skin lesions that consist of flesh colored or erythematous inflammed papules, micronodules, and rare pustules; and (4) variable pruritus. Laboratory tests are negative. Histologically, it is indistinguishable from rosacea; there is a superficial perifollicular granuloma consisting of epitheliod cells, and lymphohistiocytic infiltrate, with occasional giant cells. The disease waxes and wanes for weeks and months. Treatment consists of discontinuing topical fluorinated corticosteroid use if any, and using topical metronidazole alone or in combination with either oral tetracycline or erythromycin depending on the child's age. A low-potency topical steroid may also be used to suppress the inflammation and to wean off the strong steroid. Perioral dermatitis in childhood is probably a juvenile form of rosacea.