Gastrointestinal flu can cause fever and vomiting, and patients usually present with abdominal pain, diarrhea, vomiting and nausea. However, it can also be caused by centralized diseases or appendicitis. Gastrointestinal flu refers to gastrointestinal flu, which is caused by the “coxsackie” virus, accompanied by bacterial mixed infections, usually with symptoms of abdominal pain, diarrhea, vomiting, and may have a fever, usually higher than 38.5 degrees Celsius body temperature. However, there are also some central diseases that may cause fever and vomiting, such as increased intracranial pressure, which causes vomiting and is accompanied by fever. In addition, appendicitis and cholecystitis may also cause fever, vomiting and abdominal pain. It is recommended that after the onset of fever and vomiting, the patient should take antipyretic medication and observe whether there are other accompanying symptoms, and determine the cause of the disease based on the auxiliary examination and the patient’s medical history, and carry out symptomatic treatment under the guidance of the doctor. Patients should drink more water and rest during the treatment period, and their condition can recover gradually.