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Stomach flu

Sudden vomiting and diarrhea is usually viral gastroenteritis. A provider can order anti-nausea medication and a hydration plan online.

Also called: vomiting and diarrhea · stomach bug · viral gastroenteritis

Medically reviewed by Dr. Ikechukwu Ogbu, MD
MD · Board-Certified, Internal Medicine · Last reviewed

Get care for gastroenteritis / stomach flu online

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Stomach bug visit
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Seek urgent care or the ER if you have:

  • Symptoms that are sudden, severe, or rapidly worsening
  • High fever (over 103°F / 39.4°C) that doesn't respond to treatment
  • Chest pain, trouble breathing, fainting, or confusion
  • Signs of dehydration — dizziness, dark urine, unable to keep fluids down
  • Symptoms in someone who is pregnant, immunocompromised, or over 65

What stomach flu could be

The most common causes a clinician considers. This isn't a diagnosis — it's the differential a provider works through with you.

Gastroenteritis / stomach flu

Gastroenteritis / stomach flu is one of the more common causes of stomach flu. Ondoc can evaluate it online.

Nausea and vomiting

Nausea and vomiting is one of the more common causes of stomach flu. Ondoc can evaluate it online.

How to get care on Ondoc

Book a visit with Dr. Ogbu →

Discuss stomach flu directly with our medical director.

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Most requests reviewed within 24 hours; prescriptions sent to your pharmacy.

Learn more about Gastroenteritis / stomach flu →

Plain-language explainer of the most likely underlying cause.

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Dr. Ikechukwu Ogbu, MD — Medical Director
Dr. Ikechukwu Ogbu, MD

Board-Certified · Internal Medicine · Medical Director

4.9(2,612+ verified patient reviews)

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