Causes of Acne

About 80 percent of all teenagers develop acne, but this disease can also begin as late as the ages 25 or 30, particularly for women. No one is certain as to what exactly causes acne or why it usually begins in adolescence, but hormones, primarily testosterone, certainly play a large role. A number of other factors, most importantly heredity, are also important. If one of your parents had acne, there's a good chance you will, too.

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