Acne vulgaris is a common skin disease that affects 60-70% of Americans at some time during their lives. Twenty percent will have severe acne, which results in permanent physical and mental scarring. Acne vulgaris is American's most common diseas and is characterized by noninflammatory, open or closed comedones and by inflammatory papules, pustules, and nodules. Acne vulgaris affects the areas of skin with the densest population of sebaceous follicles; these areas include the face, the upper part of the chest, and the back.
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