A thick scar resulting from excessive growth of fibrous tissue is known as a:

A thick scar resulting from excessive growth of fibrous tissue is specifically identified as a keloid. Keloids are a type of raised scar that can develop when the body produces too much collagen during the healing process after an injury. They typically extend beyond the original site of the wound and can continue growing even after the injury has healed. This excessive growth is a result of a genetic predisposition or an abnormal response to injury.

Understanding this is important for estheticians, as keloids may require specialized treatment options, including silicone gel sheets, corticosteroid injections, or laser therapy, to help manage their appearance. In contrast, the other terms refer to different conditions: scars are general terms for healing tissues that can be raised or flat, striae are stretch marks resulting from rapid skin changes, and ulcers are open sores that do not involve scar formation in the same way keloids do.