Tetanus does not cause itching because it is mainly the toxin produced by the tetanus bacillus, which affects the muscles throughout the body through the blood circulation, resulting in persistent muscle spasms that lead to corresponding symptoms. For example, if the biting muscles of the face are in spasm, there will be a tightening of the teeth and an inability to open the mouth. If the erector spinae muscles around the spine are spastic, there will be angulation and neck stiffness. If the muscles of the limbs are in persistent spasm, there will be persistent bending of the upper limbs and bending of the hip and knee joints of the lower limbs, but usually there is no itching of the skin. If a tetanus attack is combined with itching or a rash, it is important to consider whether the allergic manifestations are due to the application of certain drugs.