DR HAROUT TANIELIAN / SCIENCE PHOTO LIBRARY DR HAROUT TANIELIAN / SCIENCE PHOTO LIBRARY
Acne pustules. Close-up of a man's upper back and shoulder area, showing small pustules due to acne vulgaris. This is a skin disorder in which the sebaceous glands of the skin become inflamed. It usually occurs in adolescence but can continue through adulthood in severe cases.
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