A tetanus shot involves injecting tetanus antitoxin into the muscle, which is a form of passive immunity. It is usually administered when there is a wound on the patient's body and a suspected infection by tetanus bacillus, effectively preventing the severe complications caused by the toxins released by the tetanus bacillus.

Since there is a wound on the body, a light diet is generally required during the eating process. It is necessary to avoid spicy and irritating foods, avoid drinking alcohol, and avoid smoking. Consuming spicy and irritating foods, including alcohol, can lead to inflammation and infection of the wound, and may even cause local blood vessels at the wound site to dilate, worsening the patient's condition.