When the skin is damaged, say with a cut, a burn or a puncture, it develops scar tissue. Sometimes its noticeable and sometimes its not. Scar tissue is thicker than normal skin. Also, as it heals, it usually turns white. That's because the melanocytes have been destroyed and as a result your body is unable to produce melanin. Therefore, we are able to re-pigment the skin with a natural color to blend in with the rest of the body. Light coloured scars can be camouflaged long term using medical tattooing treatments, during which skin coloured pigments are infused into the scar tissue to minimise its appearance.