There is a possibility of tetanus in the normal use of kitchen knives, and it is important to seek medical attention to prevent the possibility of tetanus in the event of an accidental injury from a kitchen knife. The occurrence of tetanus is mainly determined by the oxygen supply to the damaged area. In the absence of oxygen in the wound, Clostridium tetani will rapidly multiply and produce a large amount of exotoxin, causing paroxysms of intense spasms in the body, even life-threatening. However, there is no obvious inflammation at the wound site, and there may even be healing, making it hard to notice. Whenever there is a wound on the body, regardless of the size and depth of the wound, if there is a spasm after the wound, difficulty in opening the mouth and other symptoms, we should consider the possibility of tetanus, and we need to consult a doctor in time for a reasonable and standardized diagnosis and treatment.