A two-millimeter laceration from a fall on the road is usually recommended to be injected with tetanus antitoxin to prevent tetanus. The depth of a two-millimeter wound after a fall on the road is shallow, but the wound is generally dirty, and foreign matter such as dirt and dust can easily enter the wound. The tetanus bacillus can be easily detected in the dirt and dust, which makes it easy to form tetanus infection. Therefore, the wound should be disinfected in a timely manner, debridement treatment, regular disinfection, dressing change treatment. And injection of tetanus antitoxin to prevent tetanus, at the same time need to take amoxicillin, cefaclor and other antibiotics to prevent infection. If the injured person has been injected with tetanus antitoxin in the last week due to trauma and falls again, tetanus antitoxin may not be injected. If the person is allergic to tetanus toxin, tetanus immunoglobulin can also be injected.