Pathogenesis and treatment of acne in childhood.

Acne occurs more frequently in newborns and infants than one would gather from written accounts. Acne neonatorum tends to be overlooked because it is usually minor and transient. In contrast, acne infantum, which generally does not make its appearance until after 3 months of life, is more serious. Even acne conglobata may develop in infants. There are many other types of acne in childhood reflecting different pathogenetic mechanisms; included in this group are acne venenata infantum, steroid acne, hormonal disturbances, and toxic reactions.