Fever, vomiting, and diarrhea may be symptoms of gastrointestinal flu due to acute gastroenteritis. The symptoms may be caused by eating unclean food or overeating and overburdening the stomach and intestines. In this case, you can first take vitamin B6 tablets and Si Mo Tang Oral Liquid to relieve the vomiting symptoms, together with tannin yeast powder for anti-diarrheal treatment. If the body temperature is high, it is recommended to take Huo Xiang Zheng Qi Shui and Fu Fang Aminophen Alkylamine Tablets to reduce fever. Take care to eat light and digestible food during the illness, such as egg custard, thin noodles, millet yam porridge, etc. Avoid eating greasy and spicy food, and do not eat too much at a time to avoid aggravating the burden on the stomach and intestines. Replenish more water and electrolytes. Diarrhea can easily lead to dehydration, so make sure to replenish some sugar saline to avoid electrolyte imbalance in the body.