What clinical sign indicates a full-thickness burn?

A full-thickness burn, also known as a third-degree burn, is characterized by damage that extends through the epidermis and dermis, affecting deeper tissues. The clinical sign indicating a full-thickness burn includes leathery, dry skin that may appear charred or waxy. This appearance results from significant tissue destruction, where the skin loses its normal elasticity and toughness. The burnt area often lacks sensation because nerve endings are destroyed, which differs from superficial or partial-thickness burns, where pain and sensitivity are more pronounced due to intact nerve fibers.

Understanding the characteristics of different burn types is crucial in clinical settings, as it influences treatment decisions, potential complications, and the need for surgical intervention. The distinctive leathery texture and the unique color variations in full-thickness burns serve as key identifiers in diagnosing the severity of the injury.