After a tetanus shot, it is still recommended to follow the doctor’s instructions to inject relevant anti-tetanus drugs after one year of injury. For the question of whether to play tetanus injection after the injury, we can not generalize, according to the patient’s wound depth, wound contamination, as well as the size of the wound, whether there is an infection, a comprehensive determination of the need to play tetanus again. Because tetanus injection is not a permanent immunization, after tetanus injection, the immunity will only last for a period of time. After the tetanus antitoxin injection, the body produces effective active immunity time is generally only able to maintain in about 10 days, so after the injury injection of tetanus antitoxin after 10 days after the injury, or need to be injected with tetanus antitoxin treatment. It should be noted that before injecting tetanus antitoxin must do allergy test to ask about the history of allergy, allergy is not too serious patients can use desensitization therapy, diluted small amount of multiple injections, strict observation of any abnormalities. Observe for at least 30 minutes before leaving.