Tetanus has specific symptoms that should raise warning signs to go in to be seen by a doctor immediately, these signs and symptoms include: - Muscle spasm in the jaw (lockjaw) - Jaw cramping - Muscle spasms in the stomach - Entire body painful muscle stiffness - Issues swallowing - Seizures - Headache - Fever - Sweating - Blood pressure and heart rate changes If you start showing signs of tetanus and you do not get the tetanus shot, serious health concerns will start to happen due to this, including: - Uncontrolled tightening of the vocal cords - Fractures - Infections - Blockage of the main artery within a lung or one of the branches due to a blood clot - Pneumonia - Issues breathing that may lead to death