Fever, diarrhea and vomiting are symptoms of acute gastroenteritis, which may be caused by unhygienic diet and bacterial infection in the gastrointestinal tract. In this case, you can take drugs such as ofloxacin and safranin to actively treat the gastrointestinal infection. If the fever exceeds 38.5℃, you can take paracetamol or acetaminophen extended-release tablets to reduce fever. In case of severe vomiting, it is recommended to apply gastrofacial and vitamin B6 to stop vomiting. It is important to pay attention to replenish electrolytes with appropriate sugar saline to prevent diarrhea and dehydration. In severe cases, intravenous rehydration therapy is required. It is also necessary to pay attention to maintaining a light and easily digestible diet, as well as a nutritious diet, not to overeat, not to eat cold, spicy, greasy and other stimulating foods. It is also necessary to pay attention to keep the abdomen warm to avoid getting cold.