Whether or not a tetanus injection is needed after bleeding from a kitchen knife cut needs to be determined by the doctor depending on the wound, but it is recommended for safety. Tetanus antitoxin injections are usually not needed if a patient is cut with a kitchen knife and the wound is shallow and bleeding is low. Tetanus bacillus is an anaerobic bacterium, and when the wound is shallow and bleeding is low, the bacterium usually cannot survive in the wound. If the wound is deep or if the knife has cut through an object such as a living thing, the wound needs to be cleaned promptly and tetanus antitoxin injected at the same time. After being cut by a kitchen knife, the wound should first be rigorously disinfected, which can be done by applying a touch of iodophor to the wound. When the wound is more serious, drugs such as cephalosporin should be used for anti-infection treatment, and at the same time, avoid getting the wound wet to avoid triggering infection. Bleeding after being cut by a kitchen knife should promptly go to the hospital for examination, and the physician will decide whether to inject tetanus antitoxin.