If you're suffering from acne, you're not alone: nearly one in 10 American adults has this condition, and it's estimated that half of all teenagers have some acne. But do you know why this is the case and what can help? Acne is a common skin condition that affects about 50 million people in the United States-nearly one-third of the population. It usually appears between the ages of 12 and 25. It can be caused by overproduction of oil in the skin, hormonal changes, or other factors. Most people who develop acne have moderate to severe outbreaks, and serious outbreaks...