It is generally not recommended to eat ice after the New Crown vaccine. This is because the intake of iced food may cause gastrointestinal dysfunction, leading to abdominal pain and diarrhea, affecting the absorption of normal nutrients in the digestive tract and further reducing the immunity of the organism. Common adverse reactions after vaccination with the new crown vaccine include gastrointestinal symptoms such as vomiting, abdominal distension, abdominal pain, diarrhea, etc. Eating iced ones may induce, mask or add to the adverse reactions of the new crown vaccine and cause more serious symptoms such as nausea, vomiting and fever, which is not conducive to the diagnosis and recovery of adverse reactions, but generally does not affect the effect of the new crown vaccine. In addition, iced food that is contaminated with pathogenic microorganisms can also cause infectious diseases of the gastrointestinal tract, such as norovirus infection and bacterial dysentery, which can cause symptoms such as diarrhea, abdominal pain, nausea and vomiting. The abnormal symptom manifestation caused by infection can be easily confused with the symptoms of adverse reactions to the new crown vaccine, which is unfavorable for diagnosis. If the diagnosis is unknown, the disease that should be treated with medication may be misdiagnosed as an adverse reaction to the New Crown vaccine and delay the disease. Therefore, it is generally not recommended to eat foods that may trigger the disease after the New Crown vaccination. You can eat small amounts of ice three days after the New Crown vaccine if you have no other symptoms of discomfort. It is recommended to take more rest after the New Crown vaccination, ensure sufficient sleep, drink more water, avoid drinking alcohol, eat a warm and light diet, ensure that the environment is at a suitable temperature and avoid overheating, avoid eating iced food to cool down, and also avoid strenuous exercise. If serious adverse reactions occur after vaccination with the new crown vaccine, go to the hospital promptly.