Fever caused by diarrhea may be caused by bacterial infection or viral infection, need to clarify the cause of the disease and symptomatic treatment. 1. Bacterial infection:Including Vibrio cholerae, Escherichia coli and other bacterial infections, need to be treated with antibiotics under the guidance of a doctor, such as norfloxacin capsules, ofloxacin capsules, cefixime tablets, etc., and timely physical hypothermia, you can use lukewarm water to the body, the use of fever-reducing patches and so on. If dehydration is serious, oral rehydration salts can be taken. 2. Viral infections: such as rotavirus, norovirus, etc., mainly take symptomatic treatment. You can use ibuprofen and acetaminophen to relieve fever, and if the stool is watery, you can take montelukast orally to relieve diarrhea. Eat a light diet and avoid spicy and irritating foods. Inflammatory bowel disease, intestinal lymphoma can also appear diarrhea with fever. Colonoscopy is needed to clarify the cause of the disease and treat it. If the symptoms are delayed or there is aggravation, you should seek medical attention.