The treatment of a knocked-out wound must be decided according to the depth of the injury, or the severity of the wound. If the wound is relatively large, the wound must first be given a wound debridement suture after the wound is strictly disinfected, and the wound will only grow quickly when the skin can be closed. If the wound is deep, tetanus antitoxin must also be injected to prevent infection by tetanus bacilli. In addition, 2-3 days of antibiotics should be applied to prevent bacterial infection, and regular disinfection and dressing changes should be made after wound debridement and suturing. If possible, topical recombinant epidermal growth factor can be given at the time of dressing change, which can promote epidermal growth. If it is an epidermal abrasion, not cracked, and not sassafras deep, usually apply hydrogen peroxide, saline and iodine, after disinfection of the wound, keep the wound ventilated, do not bandage, the wound or faster. If you want to promote its growth, you can also use topical recombinant epidermal growth factor, can promote the growth of the wound epidermis at the same time, but also to minimize the role of scars.