Which degree burn is characterized by damage reaching the inner layers of the skin?

A third degree burn is characterized by damage that extends through the epidermis (outer layer) and dermis (inner layer) of the skin, reaching into the underlying tissues. This degree of burn destroys not only the skin layers but also affects deeper tissues, often resulting in a loss of sensation in the burned area because the nerve endings are destroyed.

Typically, the appearance of a third degree burn is distinct; the skin may appear white, charred, or leathery, and it is often dry rather than blisters that are commonly seen in second degree burns. Healing from a third degree burn can be complex, often requiring medical intervention, surgery, or skin grafts to promote recovery.

The other degrees of burns do not penetrate as deeply. First degree burns affect only the outer layer of skin and are usually minor, while second degree burns involve both the outer layer and part of the inner layer but do not reach the deeper tissues like a third degree burn. Fourth degree burns go even deeper, involving muscle and bone, but since the question specifically identifies damage reaching the inner layers of skin without explicitly mentioning deeper structures, third degree is the most accurate choice.