Stomach Flu (Viral Gastroenteritis): Symptoms, How Long It Lasts, and Why It Isn't the Flu

Primary symptoms

• Nausea and vomiting: Often the first symptoms to appear, can be severe and frequent

• Watery diarrhea: Usually without blood, may be accompanied by stomach cramping

• Stomach pain and cramping: Can range from mild discomfort to severe abdominal pain

• Low-grade fever: Usually under 102°F (38.9°C), may come with chills

• Headache and muscle aches: General body aches and fatigue are common

• Loss of appetite: Food may seem unappealing or cause nausea

When to seek care

Watch for signs of dehydration, which can be dangerous. These include dizziness when standing, dry mouth, little or no urination, and extreme thirst. Severe stomach pain, high fever over 102°F, or blood in vomit or stool also need medical attention.

When to seek immediate care

Get medical care in person right away if you can't keep fluids down, show signs of severe dehydration, or have a high or persistent fever. Seek care sooner for infants, young children, older adults, pregnant people, and anyone with a weakened immune system. For milder symptoms, a licensed doctor on Doctronic can help you decide what to do next.

Medical history and physical examination

Your doctor will ask about your symptoms, when they started, and what you've eaten recently. They'll also want to know if you've been around others who are sick. During the physical exam, they'll check for signs of dehydration and feel your abdomen for tenderness or swelling.

Diagnostic testing

• Stool sample analysis: Checks for viruses, bacteria, or parasites causing your symptoms

• Blood tests: May be done to check for dehydration and rule out other conditions

Conservative treatments

• Fluid replacement: Drink clear liquids like water, broth, or electrolyte solutions in small, frequent sips

• Rest: Get plenty of sleep and avoid strenuous activities until you feel better

• Food: When you feel able to eat, start with small amounts of foods you can tolerate and slowly return to your usual diet as symptoms improve

Advanced treatments

• IV fluids: May be needed if dehydration is severe and you can't keep fluids down

• Anti-nausea medication: Sometimes prescribed to help control severe vomiting

• Hospitalization: Required in severe cases, especially for young children or older adults with complications

Daily management strategies

Stay hydrated by drinking small amounts of clear fluids frequently throughout the day. Avoid dairy products, caffeine, alcohol, and fatty foods until your stomach settles. Rest as much as you can. Eat small amounts of food when you feel able, and don't force food while you're still vomiting.

Get fresh air if possible, but avoid contact with others to prevent spreading the infection. Use a thermometer to monitor your fever and take note of how much fluid you're able to keep down. If a doctor tells you it's influenza instead, see what to eat when you have the flu.

Exercise and movement

Avoid exercise and strenuous activities while you're sick. Light movement like walking to the bathroom is fine, but don't push yourself. Rest is crucial for recovery. Wait until at least 48 hours after vomiting and diarrhea stop before returning to normal activities.