The pathogen of tetanus is Clostridium tetani, which abundantly exists in our surrounding environment, such as rusty iron and moist soil. When the skin or mucous membranes of the human body are damaged, Clostridium tetani enters the body through these breaches. In an anaerobic environment, it grows and proliferates extensively, thereby producing toxins that cause a specific infection called tetanus. The main clinical manifestations are lockjaw, muscle spasms, and rigidity.