What type of burn affects only the outer skin layer, causing redness and slight swelling?

A burn that affects only the outer skin layer is classified as a first-degree burn. This type of burn primarily involves the epidermis, which is the outermost layer of the skin. The characteristics of a first-degree burn include redness, minor swelling, and pain. These burns are typically mild and can often be treated at home. The healing process usually takes about three to six days without permanent scarring.

In contrast, second-degree burns involve both the epidermis and a portion of the dermis, leading to more intense redness, swelling, and blistering. Third-degree burns penetrate through the entire dermis and can damage underlying tissues, resulting in a white or charred appearance, often requiring medical intervention. Fourth-degree burns extend beyond the skin into deeper tissues, such as muscle and bone, and are severe with a high risk of complications. Understanding the classification of burns is crucial for effective treatment and management of burn injuries.