A thin, narrow wound of more than 1 cm requires a tetanus shot. Tetanus is a specific type of infection caused by the bacillus tetanus. Tetanus is an anaerobic bacterium that survives extremely well in an oxygen-deficient environment, leading to a vicious infection of the wound that causes systemic symptoms. The most susceptible items include rusty nails, kitchen knives and other sharp instruments. The wound is narrow and oxygen deprived at the site of such injury, and the bacteria will release toxins into the bloodstream after infection, causing spasmodic contraction of the muscles throughout the body, resulting in difficulty in opening the mouth and corns. After the appearance of slender, narrow wounds, should be promptly injected within one hour tetanus immunoglobulin, timely blocking bacterial infection into the blood, to avoid serious consequences. The public should pay enough attention to tetanus infection, and the occurrence of injury should promptly clean the wound with water and immediately go to the hospital for surgical injection of vaccine.