The term WOUND MARK can refer to two different types of marks left on the skin after a wound has healed. The first is a SCAB, which is a dry crust that forms over a wound and protects it from infection while it heals. The second is a SCAR, which is a permanent mark left on the skin after a wound has healed. Scabs and scars are both common results of wounds, and they can be used to identify the location and severity of the wound.