When the wound exists or occurs at on surface it is known as?

When the wound exists or occurs at one surface, it is known as an abrasion. Abrasions are a type of superficial injury that involves the outermost layer of the skin, known as the epidermis. They are typically caused by friction or scraping against a rough surface. Abrasions are common injuries and they can range from mild to severe, depending on the depth of the wound.