Low-temperature burns refer to damage to the skin and even subcutaneous tissues caused by prolonged exposure to a thermogenic source of 41-60℃. Common thermogenic sources include hot water bags and heaters. Patients usually suffer from prolonged exposure to low-temperature thermogenic sources because they are asleep or have temporary loss of consciousness or limb sensory deficits due to anesthesia, intoxication, or hemiplegia. Due to gravity compression so that the limb and the heat source continue to close contact, so that the heat conduction increases, the local blood circulation is not good, at the same time the limb can not move, resulting in the local heat is difficult to disseminate, increase the heat accumulation and cause burns. Therefore, the depth of the burn wound is related to the temperature and pressure time. Although the wound is blister-like changes, but the deep tissue is seriously damaged, and even up to the muscle, bone. Low-temperature burns should be treated by a doctor in a timely manner.