The chances of getting tetanus when your hand is cut by a kitchen knife depend on the circumstances. If the knife is often in use and the wound is not deep, the chances of getting tetanus are not great; if the knife is rusty, the chances of getting tetanus will increase. The details are as follows: Tetanus is caused by the infection of Clostridium tetani, which is an anaerobic bacterium and has a high chance of existence in rust. The deeper the wound is, the less oxygen it contains, and the more suitable it is for the growth of the bacterium. The deeper the wound, the less oxygen content, the more suitable for bacterial growth. Therefore, if the chopper is not rusted and the wound is shallow, the probability of tetanus is low; if the chopper is rusted and the wound is deep, the probability is high. If your hand is cut by a kitchen knife, rinse it with saline and hydrogen peroxide in time, do not let the wound touch water, and inject tetanus antitoxin if necessary. If the hand is cut by the kitchen knife, bleeding too much, or hand sensory loss, or even after many days after the emergence of corns, teeth, etc., then as soon as possible to seek medical treatment, so as not to delay the condition.