According to the performance of the burn wound, it can be categorized using a three-degree quadratic method, i.e., first degree, superficial second degree, deep second degree and third degree. Third-degree burns are the more serious type of burns, mainly involving the entire layer of skin and even subcutaneous bones or muscles. The severity of third-degree burns is determined by the location and size of the burn. 1. Burned parts: The severity of third-degree burns varies according to the part of the body involved. If the third-degree burn is on the face, its severity is higher than that of the back, belly, etc., and the treatment process is more complicated. 2. Burn area: the more skin area involved in third-degree burns, the higher the severity. If the third-degree burns appear in the skin area is small, its processing difficulty is low; if the third-degree burns, appear in the skin area is large, or even more than 50%, its treatment difficulty is relatively high, and may even cause damage to the internal organs function, thus endangering life. If third-degree burns occur, you should go to the hospital in time for examination and early treatment to prevent the symptoms from worsening and causing other physical problems.