Under normal circumstances, the duration of fever in gastrointestinal flu depends on the individual’s physical condition as well as the severity of the disease, not necessarily fever in mild cases, but may be feverish for about 2-3 days in severe cases. The main symptoms of gastrointestinal flu, also known as coxsackievirus enteritis, are nausea, vomiting, abdominal pain, diarrhea, and in some cases, fever. If the body is weak, with dehydration, electrolyte disorders or combined with bacterial infections, fever may appear at this time, and after active treatment, most of them do not last long, usually about 2-3 days to improve. If the fever persists after more than 3 days of treatment, the condition is considered to be more serious and needs to be treated by a gastroenterologist to avoid complications. In case of severe vomiting, temporary fasting and symptomatic treatment are required, and the course of the disease is about 1-2 weeks. In case of fever, physical cooling can be taken in time, more than 38.5 degrees need to take antipyretic medicine or use antipyretic patch under the guidance of doctor.