After stomach flu, your gut needs a gentle reintroduction to food. Start with clear liquids once vomiting has stopped for a few hours, then move to bland, easy-to-digest solids within the first day or two. Most people can return to a normal diet within 48 hours, though your stomach may feel sensitive for several days as the intestinal lining repairs itself.
Start With Liquids, Then Ease Into Solids
Your first priority after stomach flu is replacing lost fluids. Small, frequent sips work better than gulping down a full glass, which can trigger nausea again. Water, clear broth, and oral rehydration solutions are your best options in the first several hours after vomiting stops. Oral rehydration drinks work because they contain a specific balance of sugar and sodium that helps your small intestine absorb water efficiently. Pedialyte, store-brand electrolyte solutions, or even a homemade mix based on the World Health Organization formula all do the job.
Once you’ve kept liquids down comfortably for several hours, you can try small amounts of solid food. Don’t force it. If a few bites sit well, have a few more an hour later. If you eat too much too soon, even a day or two into recovery, you may end up vomiting again and need to start back at square one with sips of clear liquid.
Best Foods for the First 1 to 2 Days
You’ve probably heard of the BRAT diet: bananas, rice, applesauce, and toast. It’s a fine starting point, but you don’t need to limit yourself to just those four foods. Harvard Health notes that a broader bland diet makes more sense for most people, since it provides more nutrition without irritating your gut.
Good options include:
- Starches: plain white rice, boiled potatoes, oatmeal, crackers, unsweetened dry cereal
- Cooked vegetables: butternut squash, pumpkin, carrots, sweet potatoes without skin
- Lean proteins: skinless chicken or turkey, fish, eggs
- Fruits: bananas, applesauce, avocado
- Soups: brothy, low-fat soups (not cream-based)
The common thread is soft, low-fat, low-fiber, and mildly flavored. These foods are easy to break down at a time when your digestive system is still recovering. Your intestinal lining replaces its cells every three to five days under normal conditions, so after a viral infection, it needs a short window to regenerate before it can handle heavier meals again.
Foods and Drinks to Avoid
Certain foods and drinks actively make diarrhea, cramping, or nausea worse. Skip these until you feel fully back to normal:
- Dairy products: milk, cheese, yogurt, butter, ice cream. Your gut may have trouble breaking down lactose temporarily while the lining heals.
- Fatty or fried foods: french fries, fried chicken, greasy takeout. Fat slows digestion and can worsen nausea.
- Sugary foods and drinks: candy, cookies, juice, soda. High sugar content can pull water into the intestines and make diarrhea worse.
- Acidic foods: citrus fruits, tomato sauce, vinegar-based dressings.
- Spicy foods: anything with hot peppers or heavy seasoning.
- Coffee and alcohol: both are irritants and can worsen dehydration.
- High-fiber foods: raw leafy greens, fruit and vegetable skins, nuts, seeds, beans, popcorn. Insoluble fiber is tough on an irritated gut.
A common misconception is that ginger ale settles the stomach. Most commercial ginger ale contains very little actual ginger, and the carbonation can make bloating and gas worse. Plain water or an electrolyte drink is a better choice.
Hydration Matters More Than Food
You can go a day or two without eating much and be fine. You cannot safely go without fluids, especially after repeated vomiting or diarrhea. Both strip your body of water, sodium, and potassium faster than you realize.
The most effective rehydration approach pairs glucose with sodium in roughly equal amounts. This is the principle behind the WHO’s oral rehydration formula, which contains 75 millimoles each of sodium and glucose per liter. You don’t need to memorize those numbers. Just know that plain water alone isn’t ideal because it lacks the electrolytes you’ve lost, and sports drinks often contain too much sugar. Oral rehydration solutions like Pedialyte or store-brand equivalents hit the right balance for recovery.
Watch for signs that dehydration is getting ahead of you: very dark urine, urinating much less than usual, a noticeably fast heart rate, dizziness when standing, or dry mouth that doesn’t improve with sipping fluids. In infants, fewer than six wet diapers per day (or no wet diapers for eight hours in toddlers) is a red flag that needs medical attention.
Feeding Babies and Young Children
The rules shift for infants. If your baby is breastfed and vomits once, nurse on one side every one to two hours. If vomiting continues, shorten feedings to five minutes every 30 to 60 minutes. Once your baby has gone four hours without throwing up, you can return to regular nursing, starting with shorter sessions and gradually increasing.
For bottle-fed babies on breastmilk or formula, cut the amount to half the usual feeding and offer it every one to two hours after a single vomit. If vomiting persists, drop down to one to two teaspoons every five minutes. If your baby can’t keep breastmilk or formula down at all, switch to an electrolyte solution like Pedialyte for a few hours until things calm down.
For older babies eating solids, stop all solid foods and baby foods while vomiting is active. After eight hours without vomiting, reintroduce starchy, easy-to-digest foods like cereal, crackers, and bread. Most children can return to a normal diet within 24 to 48 hours. If your child seems to improve and then vomits again after restarting solids, go back to clear liquids and advance more slowly.
Probiotics During Recovery
Probiotics may modestly shorten the duration of diarrhea after a stomach bug. The European Society for Paediatric Gastroenterology recommends strains like Lactobacillus rhamnosus GG and Saccharomyces boulardii as options alongside rehydration. Interestingly, research suggests it doesn’t matter much which specific strain you choose or whether you use a single strain or a combination. A course of five to ten days appears to be a reasonable duration, though the ideal length hasn’t been firmly established.
Probiotics aren’t a cure, and they won’t prevent vomiting. Think of them as a modest assist to your gut’s recovery, not a replacement for proper hydration and gradual refeeding.
When You Can Eat Normally Again
Most adults and children return to their regular diet within two to three days. Vomiting from most stomach viruses stops within about 24 hours, and once it does, recovery moves relatively quickly. Your intestinal cells are among the fastest-regenerating cells in your body, turning over every three to five days, so the physical damage from the infection repairs itself on a short timeline.
That said, listen to your body. If a food doesn’t sit right on day three, give it another day. Dairy is often the last category to feel comfortable again, since the enzymes that break down lactose are produced by the very cells that took the hardest hit during infection. Reintroduce milk, cheese, and yogurt gradually rather than diving back into a bowl of ice cream.