When should I be concerned about vomiting and fever together?

Reviewed by Yoshinori Abe, MD

Internal Medicine

Vomiting and fever occurring together are most commonly caused by viral gastroenteritis, often called the "stomach flu." This condition is usually not serious and resolves on its own within a few days. However, these symptoms can also point to other conditions, including food poisoning, bacterial infections, appendicitis, or urinary tract infections. Severe or prolonged symptoms—especially high fever, signs of dehydration, or intense abdominal pain—warrant prompt medical attention.

Because vomiting and fever can stem from many possible causes, it's difficult to know on your own whether you're dealing with something minor or something that needs immediate care. Taking a free, instant, online symptom check can help you better understand what may be causing your symptoms, identify red flags, and guide you toward the right next steps—whether that's rest and hydration at home or a visit to a healthcare provider.

Reviewed for medical accuracy: 07/15/2026

Important Next Steps

Discover likely causes of vomiting and fever Learn if vomiting and fever need care Find out if vomiting and fever are serious See OTC options for vomiting and fever Find doctors for vomiting and fever Discover home remedies for vomiting and fever Understand if vomiting and fever need urgent care

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Explanation

Vomiting and fever often happen together when someone has viral gastroenteritis, which is an infection in the stomach and intestines. This is common in both kids and adults.

When to be Concerned:

Severe Symptoms: If the vomiting is very bad, or if the fever is very high.
Dehydration Signs: If the person can't keep any fluids down and shows signs of dehydration like dry mouth or not peeing much.
Duration: If symptoms last more than a few days.
Other Worrisome Signs: If there is blood in vomit or stool, or if the person is very sleepy or hard to wake up.

These signs might mean that something more serious is happening, and it's important to talk to a doctor. In most cases, viral gastroenteritis gets better on its own, but staying hydrated is very important. If you are worried about these symptoms, you can use a free symptom checker to help determine whether you need medical care right away.

(References)

Hellysaz A, Neijd M, Vesikari T, Svensson L, & Hagbom M. (2023). Viral Gastroenteritis: Sickness Symptoms and Behavioral .... mBio, 36976000.
Weick MB, & Kane KY. (2003). Children with fever and vomiting benefit from immediate .... The Journal of family practice, 12540301.
Hartman S, Brown E, Loomis E, & Russell HA. (2019). Gastroenteritis in Children. American family physician, 30702253.

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