What is a scar?
Scars are irregularities in the skin surface which form when the deeper layer of skin, the dermis, is damaged. As it heals, the body produces new collagen (a protein) to repair the wound. This new collagen is, however, woven differently than the original collagen in the skin it replaces, resulting in a different appearance. Scars can be thickened above the skin surface, as in keloid scars or below the adjacent skin level, as in acne pitting. Healing after burns can cause skin and tissue contracture which may limit movement. Scars can be hyper- or hypopigmented, in contrast to undamaged, surrounding skin. The kind of scar you have will determine the appropriate treatment.