Pyoderma gangrenosum is characterized by a chronic, non-infectious, destructive ulcer which is mostly seen on distal lower extremities, but it can be found anywhere on body. We report an 18-year old man who developed keloids after healing of his ulcers. He was a known case of chronic relapsing pyoderma gangrenosum. His previous ulcers were used to heal leaving atrophic, cigarette-paper sc...