An abrasion is a superficial injury that occurs on the skin and visceral linings of the body, disrupting tissue continuity. It is a break in the skin that happens when the skin rubs off, and it may bleed slightly and hurt. Abrasions are usually minor injuries that can be treated at home. They are typically limited to the epidermis and usually do not cause significant bleeding. However, if the abrasion extends into the dermis, it may result in scar tissue formation during the healing process. Abrasions appear in all forms of blunt trauma, with friction and impact being the most common mechanisms. Thin-skinned bony areas like knees, ankles, and elbows are more prone to abrasions than thicker, more padded areas.

First aid treatment for abrasions includes washing the abraded area well with soap and water, but not scrubbing the wound. Any dirt particles from the area should be removed, and the water from the faucet should run over it for several minutes. An antiseptic lotion, cream, or petroleum jelly should be applied, and the area should be covered with an adhesive bandage or gauze pad if the area is on the hands or feet or if it is likely to drain onto clothing. The dressing should be changed often, and the area should be checked each day and kept clean and dry. A dirty abrasion that is not well cleaned can cause scarring or infection. It is important to note that abrasions often coexist with other injuries, and the presence of abrasions should initiate a thorough examination.