JIM VARNEY / SCIENCE PHOTO LIBRARY JIM VARNEY / SCIENCE PHOTO LIBRARY
Boy with acne. Teenage boy with acne (spots) outdoors with his friends. Acne (Acne vulgaris) is a skin disorder in which sebaceous glands of the skin become inflamed. Most commonly it begins in adolescence when the glands become overactive. Its mild form disappears in adulthood; more persistent, chronic acne can result in infected cysts and permanent scarring.
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