What is a Keloid?

A keloid is a patch of excessive scar tissue that may form following a skin injury. Keloids generally form after a skin injury heals. For unknown reasons, some people produce an excess of dense, fibrous tissue at and around the site of injury. A keloid is abnormal because the scar extends above and beyond the site of the original injury, whereas normal scars remain confined to the site of injury.

Extreme case of facial keloid scarring.