During the rabies vaccination, you will be informed of many contraindications, one of which is not to eat spicy food. The first is that the rabies vaccine is an antigen that can produce adverse reactions, which can lead to fever and digestive discomfort. Eating spicy food may increase the risk of adverse reactions, making it impossible to distinguish whether the adverse reactions are due to the rabies vaccine or to the inability to avoid eating. Second, the rabies virus enters the peripheral nerves from the wound and then enters the central nervous system from the peripheral nerves, which is a slow process. Eating spicy food can speed up the peripheral blood circulation, so this process may be accelerated, and the rabies vaccine may not be as effective as it should be after the acceleration, resulting in the failure of rabies prevention.