What is burn injury? It generally refers to tissue damage caused by heat, including hot liquids (water, soup, oil, etc.), vapors, hot gases, flames, incandescent metallic liquids or solids (e.g., steel water, ingots), etc. It mainly refers to the skin and/or mucous membranes, and in severe cases can also injure subcutaneous or/and submucous tissues, such as muscles, bones, joints and even internal organs. Scald is a kind of tissue damage caused by hot liquid, vapor, etc. It is a kind of thermal burn. Chinese nine-point method: the adult body surface area is divided into 11 equal parts, including 9% for the head, face and neck, 2 9% for both upper limbs, 3 9% for the front and back of the trunk (13% each) and perineum (1%), and 5 9% + 1% for both lower limbs including the buttocks (46%). First aid for burns The principles of first aid for burns ~ rapid separation from the source of injury, immediate cold therapy, first aid in the vicinity and transfer. 1, thermal burns including flame, steam, high-temperature liquid, metal, etc., commonly used methods are as follows: as soon as possible to remove the fire or boiling liquid-soaked clothes, especially chemical fiber clothing, so as not to catch fire or clothing on the hot liquid continues to act, so that the trauma deepened. Douse the fire with water, or jump into a nearby pool or ditch. Roll on the spot to press out the flame, prohibit standing or running to call to prevent head and face burns or inhalation injuries. Leave the confined and poorly ventilated site immediately to avoid inhalation injury and asphyxiation. Use non-combustible materials to extinguish the fire. Cold therapy. 2, for chemical burns burn severity acid and alkali nature, concentration and contact time, so no matter what kind of acid and alkali burns, are due to immediately flush with a large amount of clean water for at least 30 minutes or more, on the one hand, can wash out and remove residual acid and alkali, on the other hand, as a form of cold therapy, can reduce pain, pay attention to the amount of water used for boiling water should be large enough to quickly flush residual alkali from the trauma, head and facial burns hard first Pay attention to the eye, especially the cornea with or without burns, and give priority to flushing. 3, electrical burns first aid, should immediately immediately cut off the power supply, not to touch the patient when the power is not cut off, so as not to be electrocuted themselves, while artificial respiration, external cardiac compressions and other treatments, and timely transfer to the nearest hospital for further treatment.