The term MARK LEFT BY A HEALED WOUND can be summarized as a SCAR, which is a four-letter word. A SCAR is a mark left on the skin after a wound has healed. It is usually caused by the body's natural healing process, which produces collagen to repair the damaged tissue. Scars can be caused by cuts, burns, surgery, and other types of trauma. They can vary in size, shape, and color, and may be permanent or temporary.