Eating spicy food after vaccination usually does not have a significant effect on the patient’s body. However, eating large amounts of spicy food should be avoided because spicy food is irritating and may cause a series of uncomfortable reactions in patients, such as sore throat, mouth ulcers, gastrointestinal discomfort, and aggravation of dizziness, vomiting or localized itching brought about by the vaccine. Patients who eat more spicy and stimulating foods after vaccination may cause stress reactions in the body such as fever and abdominal pain, and even damage the stomach and intestines leading to diseases. It also tends to cause symptoms such as allergy and pain, which are easily confused with adverse reactions after vaccination and may lead to misdiagnosis. In addition to avoiding spicy food, you should also avoid stimulating foods such as strong tea and coffee. If no adverse effects occur after eating spicy food after vaccination, there is no need to worry. If the body shows symptoms of local skin redness, swelling, itching, or pain after vaccination, or if there is a general fever or rash, you should actively contact the vaccination site, choose a response method according to the clinical symptoms and adverse reactions of different vaccines, take the doctor’s advice, choose a suitable treatment method, and cooperate with the medical institution’s investigation by informing your health history, diet history, and medication history. Daily, you can drink more water, eat more vegetables and fruits, and exercise appropriately, which will help the organism to enhance resistance and reduce adverse reactions.