What Are Symptoms and Risk Factors of Stomach Flu?

What are symptoms and risk factors of stomach flu?


Stomach flu can cause signs and symptoms like:

  • Watery, usually nonbloody diarrhea. If you have bloody diarrhea, it usually means you have a different, more severe infection.
  • Abdominal cramps and pain.
  • Nausea, vomiting or both.
  • Occasional muscle aches or headache.
  • Low-grade fever.

Symptoms usually last just a day or two, but occasionally they may persist as long as 10 days.

Risk factors

Stomach flu occurs all over the world, affecting people of every age, race and background. There are certain people who may be more susceptible to it:

  • Young children due to unmature immune systems.
  • Older adults due to weaken immune systems.
  • Schoolchildren, churchgoers or dormitory residents since they stay in an environment for an intestinal infection to get passed.
  • Anyone with a weakened immune system.

If you live in the Northern Hemisphere, for instance, you’re more likely to have rotavirus or norovirus infections between October and April when the stomach flu viruses are most active.

* The Content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.