If your finger is bitten by a hamster and bleeds, you do not need tetanus vaccine if the wound is shallow; if the wound is deeper or contaminated, you need tetanus vaccine. Hamsters carry more bacteria on their bodies and can transmit bacteria and viruses to humans through biting. After being bitten by a hamster, it is recommended to first keep the local area clean and immediately wash it with running water for more than two minutes. If there is only a very small scratch, the wound can be recovered very quickly, and you can disinfect the local skin with iodine vapour or alcohol, and tetanus vaccine is not usually needed. Tetanus belongs to anaerobic bacteria, easy to reproduce in deeper wounds, if not cleaned in time after being bitten by the hamster, there is also a possibility of infection, need to be injected shot tetanus vaccine.