Whether bleeding from a hamster bite requires tetanus vaccination is related to whether the wound is deeper, whether Clostridium tetani is in an anaerobic environment, and how the wound is treated. 1. Deeper wounds: If the wound bitten by the hamster has a small external opening, deeper depth, necrotic tissue, local ischemia, etc., an anaerobic environment suitable for the growth and reproduction of Clostridium tetani will be formed, which may easily lead to the occurrence of tetanus. 2. Clostridium tetani in an anaerobic environment: hamsters may have Clostridium tetani attached to their mouths and teeth, which invades the human body through skin or mucous membrane breach, reproduces in an anaerobic environment and produces exotoxin. At this time, tetanus vaccine is needed for emergency prevention. 3. Wound treatment: For wounds bitten by hamsters, necrotic tissue should be removed in time. If the foreign matter in the wound is not treated thoroughly and promptly, there is a risk of tetanus. The trauma of deep wounds should be enlarged, and the wound should be flushed with 3% hydrogen peroxide solution and saline in sequence, and metronidazole antimicrobial drug can be used for treatment. Hamster bites, if not detected and treated in time, may cause tetanus, resulting in generalized convulsions, and in severe cases, respiratory arrest and death. It is necessary to consult a doctor in time, and choose the appropriate treatment plan under the guidance of the doctor, taking into account the severity of your condition.