What is the definition of an abrasion?

An abrasion is defined as a superficial wound that affects only the topmost layer of the skin, known as the epidermis. This typically occurs when the skin is scraped against a rough surface, resulting in mild to moderate injury. Abrasions may present with redness and may sometimes bleed slightly, but they often heal quickly since they do not penetrate deeper layers of skin. Recognizing abrasions is crucial for treatment and proper wound care, as they generally require only basic first aid measures, such as cleaning and protecting the area.

The other definitions provided do not align with the characteristics of an abrasion. A deep wound that affects underlying tissues describes a laceration or puncture, while ruptured blood vessels leading to a bruise refers to contusions. A pus-filled cavity in the skin is indicative of an abscess or infection, which is distinctly different from a straightforward abrasion. Understanding these differences emphasizes the nature and treatment of abrasions compared to other types of skin injuries.