How Long Does a Fever Last with Acute Gastroenteritis?

Acute gastroenteritis, commonly known as the stomach flu, can cause a fever that varies in duration depending on the individual and the severity of the illness. In most cases, patients experience a fever for about 1 to 2 days following the onset of symptoms. With prompt and appropriate treatment, body temperature typically returns to normal within this timeframe. However, in rare instances, the fever may persist for several more days.

Severe cases of acute gastroenteritis may involve complications that prolong the fever. For example, if the infection spreads to other parts of the body—such as the development of liver abscesses—the elevated body temperature may last anywhere from 7 to 20 days or longer. It's important to note that in such situations, the fever is not directly caused by the gastroenteritis itself, but rather by the secondary infections or complications that arise from it.

Maintaining proper hydration is crucial for individuals suffering from acute gastroenteritis. Symptoms like nausea, vomiting, and diarrhea can lead to significant fluid loss, which is further exacerbated by fever. As a result, dehydration becomes a serious concern. Patients are advised to drink plenty of fluids to replace lost water and electrolytes. In cases where oral intake is not sufficient or not tolerated, medical attention may be necessary, and intravenous (IV) fluid replacement might be required.

In summary, while most people with acute gastroenteritis will see their fever subside within a couple of days, close monitoring of symptoms and timely medical care can help manage complications and support a faster recovery.