The depth of burns is divided according to the level of skin tissue damage, and injuries of different depths have different trauma characteristics, healing time and healing characteristics, and require appropriate treatment measures. In the past, the depth of burns was divided into three degrees and four minutes, which has been revised to four degrees and five minutes. Recognition of burn depth: using three degrees and four divisions (four degrees and five divisions); division, level of injury, performance, pain, healing time. 1.I superficial epidermis erythematous cauterization 3-7 days healing; 2.Superficial II epidermis hair growth layer, papillary dermis blisters, basal flushing severe pain 1-2 weeks healing; 3.Deep II dermis deep dermis blisters, basal red-white dull pain 3-4 weeks, scarring; 4.III epidermis dermis full layer, subcutaneous fat scorched scabs, waxing and waning, scorching, small pieces of self-healing; 5.Dendritic embolism disappeared implanted skin healing; 6.IV deep Fascia to deep III+ tendons, nerves, blood vessels, disappeared Disinfection, amputation; organ damage, flap repair. Functional disorders 1, I degree burns take the previously mentioned emergency treatment, without special treatment can be self-healing; 2, shallow II degree burns if only a single blister, can be drawn out by the doctor under sterile conditions blister fluid after bandage treatment, multiple or larger area can be bandaged or exposed, supplemented by burns with topical medication; 3, deep II degree burns can be taken to the bandage, exposure treatment, or grinding scabs, chipping surgery; 4, III The degree of burns generally take cutting scab, a variety of implant surgery; 5, IV degree burns if the destruction of serious need to amputation (or amputation of fingers, toes) treatment, if there is a possibility of saving, take the skin flap repair. In addition to I degree and not infected shallow II degree burns, other depth of burns are left with scarring.