After stomach flu, the stomach often stays sensitive even after vomiting or diarrhea starts to ease. The first goal is still fluids. Small amounts taken often work better than big glasses at once.
The second goal is a gradual return to food. The stomach does not need a long fast. Simple, familiar meals are usually the best way back.
Start with fluids#
Water, tea, broth, diluted juice, and rehydration drinks are useful early on. If nausea is still present, small sips are easier than large drinks.
Signs of dehydration include very little urine, dry mouth, dizziness, and unusual tiredness. In children, fewer wet diapers, floppiness, and poor drinking matter even more.
What to eat first#
When appetite returns, start with foods that are mild and familiar. Porridge, rice, potatoes, banana, toast, soup, or simple yogurt are often well tolerated. The portion can be small.
There is no perfect list that fits everyone. If one food clearly makes you feel worse, put it aside for a while and try again later.
What can wait#
Fatty food, alcohol, large meals, and very sweet drinks can wait until the stomach feels more stable. Some people tolerate dairy right away, while others need a few days because temporary lactose sensitivity is common after stomach flu.
When to return to normal#
Normal eating usually returns once vomiting has stopped, diarrhea has eased, and energy begins to come back. That often happens within a few days. Keep the first normal meals moderate rather than large.
Return to school, day care, work, and food preparation for others only when you are no longer vomiting or having diarrhea and the general condition is back on track. Norovirus and similar stomach bugs can still spread near the end of symptoms.
When to seek care#
Seek care if you cannot keep fluids down, if dehydration is a concern, if diarrhea or vomiting continues, or if there is blood in the stool, high fever, strong abdominal pain, or a clear drop in general condition. Children, older adults, pregnant people, and people with chronic illness need a lower threshold.
Further reading and sources#
Further reading: