Lip knocked a deep mouth can first local spray Yunnan Baiyao powder, and then pressed with cleaner paper and gauze, promptly go to the hospital to deal with. The deeper wound must be cleared and sutured, otherwise it is difficult to live long. Later, you can use topical drugs such as iodophor or Bactrim again for disinfection treatment, or you can use iodine for disinfection, and then alcohol for deiodination. If the local redness and swelling is serious, you also need to give anti-inflammatory treatment with cephalosporin antibiotics or metronidazole and other drugs. During the period when the wound is not healed, you should not eat too spicy food, such as chili peppers, spicy sticks, spicy hot pot, etc. You should not drink alcoholic beverages, and you should reduce activities at the local wound, such as talking less, eating less hard food, resting as much as possible and drinking more warm water. You can apply local scar patch or scar cream to reduce the formation of local scar.