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A scar is a mark left in the skin by the healing of a wound or surgical incision in which the normal functional tissue (skin) is replaced by connective tissue (scar). Keloids are excessive accumulations of scar tissue beyond what is normally seen in most people. Keloids are more raised and thickened masses of connective tissue than scars.

Scars and keloids do not usually cause medical problems. One exception is cesarean (c-section) scars. Some women experience spotting after their menstrual flow has finished due to their cesarean scars (REFERENCE - Physician's Weekly Clinical Updates, January 27, 1997). Other people experience chronic pain that is associated with a scar. Even if a scar or keloid is not causing a medical problem, they are unsightly and unappealing from an aesthetic point of view, and most people want to get rid of them!