A keloid is a type of raised scar that forms when the body produces too much collagen during the healing process. These scars can develop after an injury, surgery, or even from acne or piercings. Keloids are often larger than the original wound and can be itchy or painful. Keloids can occur on any part of the body but are more common on the chest, shoulders, and earlobes. They are more prevalent in individuals with darker skin tones. Treatment options include corticosteroid injections, silicone sheets, and in some cases, surgical removal, but keloids may recur after treatment.