Keloids are thick, raised scars that may appear after an injury, such as a piercing or after stitches. Months can pass before a keloid scar appears after the injury. Once it begins, a keloid tends to grow slowly for months or years. This slow growth differs greatly from another type of raised scar called a hypertrophic scar.
A hypertrophic scar appears one to two months after you wound your skin, and doesn’t grow beyond the wound. With time, a hypertrophic scar often becomes less noticeable. While keloids tend to develop slowly, some appear more quickly and don’t fade with time.
Anyone can get a keloid, but Black people have the greatest risk of developing keloids. People of Asian, Latin American or Mediterranean descent are also more likely to develop keloids than people who have a lighter skin tone.