The fact that the wound heals in a few minutes indicates that the wound is superficial, and this should be decided in conjunction with whether active immunization has been administered and the type of wound. If the injured person is under 10 years old, he or she is usually immunized against tetanus, i.e., actively immunized, and no further intramuscular injection of tetanus antitoxin is required. If the patient is over 10 years old, the concentration of actively immunized tetanus antibody is not enough, and the wound condition should be considered. If the wound is clean, tetanus antitoxin is usually not needed, and if the wound is contaminated, tetanus antitoxin should be injected into the muscle as soon as possible. The need for tetanus is generally judged according to the degree of scratching, the contamination of the wound and the immune base of the casualty. Contaminated wounds, such as wounds caused by rusty metal or wounds with a lot of mud and dust at the site of injury, should generally be injected with tetanus antitoxin as early as possible, because Clostridium tetani is widely found in mud, feces and dust. It is recommended to consult the hospital for standardized treatment.