Tetanus causes fever. Tetanus is an acute infectious disease with a certain incubation period. At the beginning of the disease, patients may have symptoms such as dizziness, fatigue, sweating, etc. Heavy patients may have fever, mainly caused by the sympathetic nerves affected by the toxin, which is usually high fever, accompanied by profuse sweating, tachycardia, elevated blood pressure, and cold extremities, etc. After the Clostridium tetani invades the body through a skin or mucous wound, the toxin produced can attack the patient’s nerves. After Clostridium tetani invades the human body through skin or mucous membrane wounds, the toxin produced can attack the patient’s nervous system. Therefore, the typical symptom of tetanus is the continuous contraction of the muscles, from the chewing muscles to the facial muscles, neck muscles, diaphragm muscles, etc., and strong paroxysmal spasms can occur, which can be characterized by the typical expression of a bitter grin, and the expression of the coracoid arched face, etc. When tetanus occurs secondary to the lungs, it is usually accompanied by high fever, rapid heartbeat, elevated blood pressure, and cold extremities. When tetanus is secondary to lung infection, the white blood cells increase significantly, and the symptoms of fever will also appear. When the patient has muscle spasm, bitter smile face, with pain, fever and other symptoms, should promptly consult the doctor, and actively cooperate with the doctor’s treatment.