Covering the wound, which means dressing the wound, usually needs to be judged according to the situation of the wound whether it needs to be dressed, covering the good or breathable can not be generalized. If it is a minor scrape, fall, burns, etc., there is no obvious bleeding, broken, generally do not need to dressing, rinse the wound with water or iodine volts can be, while avoiding re-injury. In the case of mild burns, scalds, etc., the wound can be protected from bacteria by bandaging, while helping to reduce the pain generated by friction wounds. However, for severe falls, abrasions and cuts from sharp objects, which are often accompanied by heavy bleeding, breakage and open wounds, etc., they are prone to bacterial invasion and infection. Therefore, it is necessary to go to the hospital for a comprehensive and thorough disinfection, and then dress with sterile gauze, which can be reviewed regularly and replaced with new gauze dressings as prescribed by the doctor. If the burn, scalding trauma is large, or even injured deep tissue trauma, can not use the bandage method, especially the head and neck, perineum, back, armpits and other areas not easy to bandage, may prevent the discharge of pus, and the wound is not breathable more likely to aggravate the infection. Usually, dressings such as petroleum jelly gauze and oil gauze can be used to cover the wound, and the condition of the wound can be closely monitored. In addition, dressing is not recommended in summer or in hot climates to avoid aggravating local infection. Even if a dressing is needed, a light dressing is usually used and should not be wrapped too thickly to avoid secondary infection from sweating of the skin near the wound.