Whether or not you can eat cold food after vaccination is determined by your own body type. In general, if the gastrointestinal function of the vaccinees is normal, they can eat ice in moderation, and it usually does not have any significant effect on the effect of the vaccine. However, for people with weak gastrointestinal tract or infants, eating ice after vaccination may cause abdominal pain, diarrhea, nausea, vomiting, etc. For people with normal gastrointestinal function, if they eat ice diet in excess, it may also cause irritation to the mucous membrane of the gastrointestinal tract, which may cause violent contraction of the gastrointestinal tract and lead to spasm and produce symptoms such as abdominal pain and diarrhea, while vaccination may also produce gastrointestinal discomfort and lead to adverse reactions such as diarrhea and abdominal pain, which may easily cause misjudgment or misdiagnosis. In addition, the superposition of the two effects may aggravate the gastrointestinal symptoms of the vaccine recipient. Therefore, it is generally not recommended to consume an iced diet after vaccination. If the gastrointestinal tract normally functions normally and the weather is hot and you really want to eat ice, you can eat in moderation, but avoid over-eating. In addition to not eating iced or cold foods after vaccination, you should also be careful to avoid spicy and stimulating foods and seafood, all of which may produce digestive discomfort symptoms that can be easily confused with post-vaccination symptoms. In addition to food, avoid getting cold after the vaccination and avoid getting water on the needle holes to avoid colds or infections.