Keloids By Denise M Aaron, MD, Dartmouth Geisel School of Medicine Reviewed / Revised Jan 2022 | Modified Sep 2022 View Patient Education Diagnosis Treatment Topic Resources Keloids on the Ear and Face Keloid Keloid Scars Keloids are smooth overgrowths of fibroblastic tissue that arise in an area of injury (eg, lacerations, surgical scars, truncal acne) or, occasionally, spontaneously.