You're not alone: About 90% of all teenagers develop acne. Acne is starting at even younger ages today as puberty begins earlier. Acne may also start as late as the 20's or 30's, especially in women whose hormones are constantly fluctuating. It's estimated that 1 in 4 adults between the ages of 25 and 44 experiences acne, and nearly half of all adult women experience mild to moderate acne.

The most important thing to remember about acne is: It's not your fault. Contrary to popular belief, acne is not caused by anything you're doing - what you eat, how often you wash your face or work out - but by a combination of factors at work far beneath the surface of your skin. The regularity with which you shed skin cells can change throughout your life. Your hormone balance affects the rate at which you produce oil. Research has also shown that genetics play a big part in the development and persistence of acne, so your family history is a valuable prediction tool as well.

Find out more about acne by clicking on the topics below.