A 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 5/26/2023
Updated by: Tang Ho, MD, Associate Professor, Division of Facial Plastic and Reconstructive Surgery, Department of Otolaryngology - Head and Neck Surgery, The University of Texas Medical School at Houston, Houston, TX. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.