High fever and vomiting may be caused by acute gastroenteritis, acute appendicitis and acute cholecystitis. 1. Acute gastroenteritis: When acute gastroenteritis attacks, due to the presence of inflammation and infection in the gastrointestinal tract, it may cause high fever, vomiting, and may be accompanied by abdominal pain, diarrhea and other symptoms. 2. Acute appendicitis: Usually, the infection is induced by the obstruction of the appendiceal lumen caused by the fecal stone at the appendix and the lymphatic tissue in the intestinal wall. When appendicitis acute attack, due to the presence of inflammation and infection of the appendix, it may cause high fever, vomiting, may also be accompanied by abdominal distension, nausea and other symptoms. Prompt medical attention is recommended, and if necessary, surgical removal of the appendix. Avoid pus and perforation. 3. Acute cholecystitis: the gallbladder is located in the gallbladder fossa part of the liver, when acute cholecystitis attacks, under the stimulation of inflammation, it may cause high fever, vomiting, may also be accompanied by loss of appetite, nausea and other symptoms. It is recommended that anti-inflammatory and cholecystitis treatments be carried out under the guidance of a doctor. High fever and vomiting may also be caused by other reasons, it is recommended to consult a doctor in time to confirm the cause of the disease, and then give targeted treatment.