Which degree of burn involves destruction of the epidermis, dermis, and subcutaneous layer?

A third-degree burn is characterized by the destruction of the epidermis, dermis, and extends into the subcutaneous layer. This type of burn typically results in significant tissue damage, including the complete loss of skin function and sensation in the affected area, as the nerve endings are destroyed. The skin may appear white, charred, or leathery, and the severity of tissue destruction can lead to complications such as infections and delays in healing requiring medical intervention.

In contrast, a first-degree burn only affects the epidermis, causing redness and minor pain. A second-degree burn involves both the epidermis and part of the dermis, resulting in blisters and more intense pain. A fourth-degree burn, while it extends deeper than a third-degree burn, includes full-thickness destruction of skin and can involve underlying muscles, tendons, and bones, often requiring extensive medical treatment such as surgery or grafting. The third-degree burn remains distinct because it leads to a loss of both skin structure and sensation without immediate involvement of deeper tissue such as muscle or bone.