Fever, diarrhea and nausea are considered to be caused by acute gastroenteritis, appendicitis or influenza. 1. Acute gastroenteritis: may be due to the patient’s dietary inappropriate long-term eat expired and spoiled food, or pathogens occur bacterial infection, which leads to patients with fever diarrhea and nausea, the patient can follow the doctor’s instructions to take norfloxacin tablets or montelukast punch. 2. appendicitis: usually due to appendicitis stimulate the patient’s gastrointestinal tract and the temperature center, so there is a fever, diarrhea and nausea of the adverse reaction, the patient can take ibuprofen extended-release capsules and other medications under the guidance of the doctor, surgical treatment. 3. Influenza: generally because of influenza caused by the patient’s immunity and digestive function decline, and then fever diarrhea and nausea, the patient can be instructed by the doctor to take oseltamivir capsules or compound aminophenolamine tablets and other drugs. Fever, diarrhea and nausea may be related to other factors, it is recommended that patients go to the hospital in time for examination.