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.
Update Date 10/18/2013
Updated by: Richard J. Moskowitz, MD, Dermatologist in Private Practice, Mineola, NY. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Bethanne Black, and the A.D.A.M. Editorial team.