What burns are characterized by damage to underlying tissues?

Third-degree burns are characterized by damage not only to the epidermis (the outer layer of skin) but also to the dermis (the underlying layer of skin) and may extend deeper into the subcutaneous tissue. This type of burn can result in a loss of sensation in the affected area due to the destruction of nerve endings, and the skin may appear white, leathery, or charred. Because of the extensive damage to underlying tissues, healing is typically slow and often involves significant medical intervention, which may include skin grafts.

Understanding the characteristics of the various degrees of burns is crucial in fire investigations, as it can help make determinations regarding the severity of a person's injuries and the potential causes of the fire.