Scar

A scar is a mark left on the skin after a wound has healed. It forms when the body repairs itself after an injury, surgery, or inflammation. The healing process involves the production of collagen, a protein that helps patch the damaged skin. Scars can vary in appearance; some may be flat and pale, while others can be raised or darker than the surrounding skin. They are a natural part of healing and can fade over time, though they often never disappear completely. Scars can also occur internally, affecting tissues and organs beneath the skin.