...Acne is most common in adolescent boys , but it can occur in both sexes and at all ages. The tendency to acquire acne is inherited. The condition commonly appears at puberty and can continue for many years. Three out of four teenagers have acne to some extent, probably caused by hormonal changes that activate the sebaceous (oil secreting) skin glands. Other hormonal changes that happen with menstrual periods, pregnancy, use of birth control pills, or stress, also aggravate acne....»
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«...Acne is a major problem for millions of people. Although it is not caused by a single factor, acne is primarily caused by overactive sebaceous glands that result in excess oil. This overproduction of sebum when combined with dirt and bacteria results in acne formation....»
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