If the chin is knocked, it is recommended to go to the hospital for debridement and suturing, because the chin is located in the face, if not sutured, the wound will leave a big scar after healing, affecting the beauty. When you go to the hospital to perform debridement and suturing, you should first rinse the wound with hydrogen peroxide to kill the bacteria and fungus in the wound and remove the foreign body in the wound, then rinse the wound with saline repeatedly and disinfect the wound with iodine volts several times and then suture the wound. If the wound rupture is very regular, it needs to be sutured; if the wound edge is not regular, you need to use scissors or use a razor blade to trim the wound flat, so that the scar is not obvious after suturing. Inject tetanus antitoxin to avoid tetanus infection. Later, oral cephalosporin antibiotics should be taken to prevent infection of the wound.