Tetanus is an acute infectious disease in which Clostridium tetani invades the body through a wound in the skin or mucous membranes, grows and multiplies readily in an anaerobic environment, produces toxins and causes symptoms such as paroxysmal muscle spasms. Clostridium tetani is widely found in soil and feces. Its reproduction requires an anaerobic environment. Ischemic necrosis of wound tissue and other bacterial infections provide favorable conditions for tetanus to multiply. Severely contaminated wounds, torn tissues, wounds with poor circulation, and wounds with poor drainage and the need to be infected with purulent bacteria are all susceptible to infection. The toxins produced by tetanus attack the patient’s nervous system, leading to symptoms such as closed teeth, paroxysmal spasms and tonic spasms. The disease usually has a rapid onset and a high mortality rate, but it can be prevented by vaccination. The prognosis for tetanus is generally good when treated early. If the disease is severe and treatment is delayed, it can be highly life-threatening.