Acne is a skin condition that causes whiteheads, blackheads, and inflamed red lesions to form. These growths are commonly called pimples or "zits." Three out of four teenagers have acne to some extent.
Review Date 7/25/2017
Updated by: David L. Swanson, MD, Vice Chair of Medical Dermatology, Associate Professor of Dermatology, Mayo Medical School, Scottsdale, AZ. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.