A skin wound caused by tangential trauma when the skin contacts a resistant object or surface with sufficient force; often caused by rubbing, sliding, or compressive forces. In lay terms, often referred to as a scrape or scratch. Abrasions may be small (e.g., “skinned knee”) or large (e.g., “road rash”) and can involve different degrees of epidermal and dermal tissue loss. Different types of abrasions include scrape or brush, collar, linear, imprint, grazed, friction, and patterned.