After the chickenpox vaccine, you should pay attention to a light diet and avoid allergic foods. 1. Light diet: After vaccination, some people may have immune reactions such as fever, which may be accompanied by a decline in gastrointestinal function, causing indigestion. It is recommended to eat a light diet, drink plenty of warm water, try not to drink alcohol, and avoid spicy stimulation, greasy and indigestible food such as barbecue and rice cakes. 2. Avoid allergic foods: Be careful not to eat allergic foods such as seafood and mutton. Because after vaccination may cause allergic reactions, it is not easy to distinguish the cause of allergy after eating allergic foods.