Usually tetanus immunoglobulin is most effective when injected within 24 hours of injury, or within 3 days of injury if not injected within 24 hours. Tetanus is mostly an infection caused by Clostridium tetani entering the body as a result of a cut from a rusty piece of iron, and often manifests itself clinically as a symptom of muscle spasms. The incubation period of tetanus virus in the human body is about 3-7 days, and tetanus immunoglobulin injection before the appearance of clinical symptoms can be combined with tetanus bacterial exotoxin in time to eliminate the toxin. If clinical symptoms appear, tetanus immunoglobulin injection can also eliminate part of the bacterial toxin and relieve muscle spasm symptoms continue to worsen. Usually, one injection of immunoglobulin lasts for about 10 days. Patients with tetanus trauma must promptly go to the general surgery department of a regular hospital for a detailed examination of the wound and an active injection of tetanus immunoglobulin to fight the toxin.