An abrasion is defined as:

An abrasion is characterized as a superficial wound that affects only the topmost layer of the skin, known as the epidermis. This type of injury typically occurs when the skin rubs against a rough surface, resulting in the removal or damage of this outer layer. The hallmark of abrasions is that they do not penetrate deeper layers of the skin, which distinguishes them from more severe injuries like lacerations that can involve deeper tissues, structures, and even more serious complications.

Understanding that abrasions primarily involve the epidermis is crucial for appropriate wound management. They may present with redness, and minor bleeding, and are often painful, but they typically heal without extensive intervention. This knowledge is especially useful in clinical settings, as it helps healthcare providers determine the necessary treatment and follow-up for such injuries.