Tetanus shots require 30 minutes of observation before going home, mainly because of the fear of allergic reactions and discomfort after the tetanus toxin injection. Clinically, after the injection of all kinds of vaccines, it is necessary to stay under observation, mainly because of the fear of allergic reaction and general discomfort after the injection. Any abnormality found during the observation can be treated in time to prevent danger. After the tetanus toxoid injection, it is also necessary to observe the patient for 30 minutes, during which time no abnormality occurs, and then you can return home. After the tetanus injection, once found obvious rash, dyspnea, vomiting and other clinical symptoms need to communicate with the doctor in a timely manner, under the guidance of the clinician to carry out standardized treatment, to avoid causing delays in the condition. If the injection is tetanus immunoglobulin, there will be no allergic reaction, 10 minutes of observation after the injection, there are no symptoms such as dizziness, hypoglycemia, etc., you can return home.