What are the most common causes of fever and nausea?

It would be difficult to list all the causes of fever and nausea because there are thousands of them. Fever really helps decide what might be causing nausea or vomiting, because it removes certain things from the list. In general, the most common causes of fever and nausea are gastrointestinal viral illnesses and parasitic, amoebic, or bacterial gastrointestinal infections. People sometimes feel nauseated when they have a fever, even if they don't have any form of stomach infection.

The classic stomach flu, which is often caused by a class of viruses called rotaviruses, can cause fever and nausea at the same time in some people. They are rarely the only two symptoms of this disease. Many people also develop stomach pains, cramps, diarrhea, and/or vomiting, too.

Although most people survive the stomach flu and recover from the worst of its symptoms within a few days, excessive vomiting or diarrhea, especially with fever, can lead to dehydration, and the risk is greater for very young and the very old. , or the medically vulnerable. Continuous vomiting or diarrhea for more than half a day in medically vulnerable patients should be reported, and people who are sick for more than a day with stomach flu symptoms should also contact their doctors, especially if the fever is greater than 100.4 degrees F (38 degrees C)

Another common cause of fever and nausea is amoebic, parasitic, or bacterial infections, which often result from the consumption of contaminated food. Simple cases of food poisoning can seem similar to the stomach flu. More severe illness can cause not only fever and nausea for several days, but also severe vomiting and/or diarrhea. Some of these infections persist, creating stomach upset for long periods of time, and are of particular concern when stomach upset is combined with a prolonged fever. Such symptoms are always a good indication to see a doctor.

As the body heats up, people can feel sweaty, achy, dizzy, and uncomfortable. Therefore, virtually any fever can make people feel disoriented and nauseated. This could happen during any type of viral or bacterial infection. People can usually tell that the fever, rather than the illness, is directly causing nausea because other symptoms point in a different direction.

There are many other conditions that can cause fever and nausea. A pregnant woman with a virus could have both symptoms. Some forms of abscesses, stomach cancer, hormonal imbalances, and other conditions can also cause these two symptoms. There are many other examples. These are generally rare compared to the more common and predictable reasons why people feel sick to their stomach and develop a fever.

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