Burns (burn) mainly refer to damage to the skin, mucous membranes, and even deep tissues caused by heat, chemicals, electricity, radiation, etc. Among them, thermal burns of the skin (such as flame, boiling water, etc.) are the most common. According to statistics, burns rank second only to traffic accidents in the number of deaths due to accidental injuries each year, and there are also a large number of injuries combined with burns in traffic accidents. The annual incidence rate of burns in China is about 1.5% to 2%, that is, about 20 million people suffer from different degrees of burns every year, and about 5% of these burn patients need hospitalization. The health hazards of burns include both physical and psychological. Burns can be classified according to the mechanism of injury, depth, degree and associated injuries and complications. The name of the disease of water and fire burns is early found in the Treatise on the Origin of Diseases – Tang and Fire Sores. The name of burn injury in Chinese medicine is as follows. Water and fire burns refer to the direct action of burning materials and scorching liquids, solids, gases, and electric currents on the human body, causing skin scalding or burns, or even internal attack of fire poison on the internal organs. The area and extent of the injury is related to the temperature and the time of action, and the main manifestation of the injury is redness, swelling, heat, pain, blistering, crusting, fever, irritability, yellow mouth and even fainting. Burns are superficial skin injuries and are relatively easy to diagnose. In order to better manage and assess the prognosis, it is important to correctly estimate the area and depth of burns. First, the burn area calculation Burn area is generally expressed as a percentage of the whole body skin area, commonly used to calculate the nine-point method: 9% of the head and neck, 18% of the bilateral upper limbs, 27% of the trunk, 45% of the bilateral lower limbs, external genitalia 1%. In children, the percentage of skin area on the head is higher, while the lower extremities are lower and should be properly corrected. Small area burns can also be measured with the patient’s own palm, that is, a palm for 1%. Second, the depth of burns assessment burns are generally divided into three degrees of depth 1, Ⅰ degree burns Ⅰ degree for the surface burns, only epidermal cuticle damage and local capillary congestion. The injury has redness, swelling, heat, pain, also known as erythema burns. After 3-5d flaking self-healing a scar. 2, Ⅱ degree burns Ⅱ degree burns, and can be divided into shallow Ⅱ degree and deep Ⅱ degree. (1) shallow Ⅱ degree: refers to the epidermis of the whole layer and the dermis shallow layer burns, also known as blister type burns. If the blisters peel off, the wounded surface is light red, with local swelling and severe pain. If there is no infection, it can heal within 2 weeks, leaving pigmentation and little scar formation. (2) Deep II degree burns: the injury reaches the deep dermis, local congestion and oozing, tissue necrosis, there can be blisters, after the burnt skin is torn off, the wound surface is pale, or red in white, there are small bleeding spots, edema is obvious. Out of the dermis in the skin nerves are mostly destroyed, pain is not as sharp as the shallow II degree. If there is no infection, the necrotic tissue forms a scab and the residual skin gradually heals under the scab in 3-4 weeks. After healing, there is a scar, which can also cause deformity. But because of necrotic tissue and exudate, under the scab is very easy to be infected, and the infection evolves to degree III. 3.Ⅲ degree burns Ⅲ degree burns damage the whole layer of skin, and can involve subcutaneous tissue, muscle, and even bone. The local wound surface becomes a scab, hard, dry, waxy or scorched black, sensation is lost, no blisters, and dendritic embolic venous branches can be seen. The scabs usually separate and fall off gradually after 3-5 weeks, and the trauma surface forms granulation. It takes more than 1 month for small burns to heal, and for large third-degree burns, the trauma surface needs to be healed by skin grafting, and the scars are severe and deformities occur. The severity of burns is usually mild with a total area of 10% or less for a second-degree burn. A total area between 11% and 30% or a second-degree burn with an area of 10% or less is considered moderate. Those with a total area of 31% or more, or those with a total area of 10% or more of third-degree burns, are considered severe. In addition, if there are combined respiratory burns and other compound injuries, they should be classified as severe or extra severe burns. During the diagnosis process, except for very severe burns, which require immediate emergency resuscitation, including shock resuscitation, tracheotomy and treatment of combined injuries, detailed inquiries should be made about the injury, the cause of the burn, the time of exposure, post-injury emergency treatment and transport time, etc., and a thorough examination of any combined injuries.