If the area of Ⅲ degree burns is small, after the professional doctor’s change of medicine can be self-healing may, if the burn area is relatively large can not be self-healing, need surgery to repair. Burn depth is generally divided into Ⅰ degree, shallow Ⅱ degree, deep Ⅱ degree, Ⅲ degree, and Ⅳ degree. Superficial degree II is epidermal burns, while deep degree II is superficial burns of the epidermis and dermis. The third degree is a full skin layer, with total necrosis of the epidermis and dermis. The prerequisite for self-healing burns is that the deeper tissues must have more normal sebaceous glands or sweat glands, that is, skin attachments or deep dermal tissues, which become epithelialized after turning into skin islands, and then slowly heal. Especially small burns such as 1cm or 2cm or less can heal by crawling, i.e. the peripheral epidermis crawls over, after a professional change of medication and clearing treatment. When the area of third-degree burns is large, if not surgically repaired it may lead to serious infection and even deepening of the wound, which may cause damage to the patient’s vital signs, nutritional status, and organ function. Therefore, large third-degree burns need to be repaired surgically, otherwise they may be life-threatening when there are more sites, large areas, and long-term non-healing.