OverviewA keloid is a type of exaggerated (hypertrophic) scar that usually appears following an obvious injury. Keloids may expand beyond the margin of the scar to include normal skin.
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.