Scars are a natural part of the body's healing process. A scar results from the biologic process of wound repair in the skin and other tissues. Most wounds, except for very minor ones, result in some degree of scarring.
Scars form when the dermis (deep, thick layer of skin) is damaged. The body forms new collagen fibers (a naturally occurring protein in the body) to mend the damage, resulting in a scar. The new scar tissue will have a different texture and quality than the surrounding tissue. Scars form after a wound is completely healed.