OverviewWarts are a very common skin condition. They frequently appear as single lesions or in small groups. This is a photograph of an unusually severe and extensive case of warts. (Image courtesy of the Centers for Disease Control and Prevention.)
Review Date 10/24/2016
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, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.