After the stomach flu passes, your digestive system needs a gradual return to normal eating. The general rule is to rest your stomach for about six hours after vomiting stops, then begin with small sips of clear fluids before slowly working up to bland solid foods. Rushing back to your regular diet can trigger a relapse of nausea or diarrhea, but being too restrictive for too long can slow your recovery.
Start With Fluids, Not Food
Your first priority is replacing lost water and electrolytes. Vomiting and diarrhea drain sodium, potassium, and fluid from your body quickly, and dehydration is the main risk of any stomach bug. Once you’ve kept down small sips of water for an hour or two, you can move to other clear liquids: broth, diluted sports drinks, or an oral rehydration solution. Oral rehydration solutions work because they contain a 1:1 ratio of sodium to glucose, which activates a transport system in your gut that pulls water into your bloodstream far more efficiently than water alone.
Avoid fruit juice, soda, and other sugary drinks during this phase. They contain too much sugar relative to electrolytes, which can actually pull water into your intestines and make diarrhea worse. Apple juice and similar clear liquids don’t adequately replace sodium or potassium, and in some cases can cause dangerously low sodium levels, especially in children.
Ease Into Bland Solid Foods
Once you’re tolerating fluids well, typically within 12 to 24 hours after symptoms ease, you can start eating small amounts of bland, easy-to-digest foods. Good options include:
- Plain white rice or plain noodles
- Toast or crackers (without butter)
- Bananas
- Mashed potatoes (without cream or butter)
- Plain chicken (baked or boiled, not fried)
- Applesauce
- Gelatin
You may recognize bananas, rice, applesauce, and toast as the classic “BRAT diet.” While those four foods are still fine choices, a strict BRAT-only approach is no longer recommended. The American Academy of Pediatrics found it’s too nutritionally restrictive to support real recovery, and following it for more than 24 hours may actually slow healing. The better approach is to use BRAT foods as a starting point but add other soft, bland options as soon as you can tolerate them.
Keep portions small. Three or four bites is enough for your first meal. If that stays down comfortably, eat again in a couple of hours. Smaller, more frequent meals put less strain on your digestive tract than trying to eat a full plate.
Adding Protein and More Variety
Within a day or two of eating bland carbohydrates, most people can start adding lean protein and a wider range of foods. Plain chicken, turkey, eggs, and fish are all reasonable next steps. These give your body the building blocks it needs to repair the intestinal lining that the virus damaged.
Cooked vegetables like carrots, squash, and green beans are easier to digest than raw ones and add nutrients that simple starches don’t provide. Plain oatmeal is another good bridge food. The goal is to expand your diet steadily over two to four days until you’re eating normally again. Let your body guide you: if something causes cramping or nausea, back off and try again the next day.
Foods and Drinks to Avoid
Your gut lining takes a beating during the stomach flu, and certain foods will irritate it while it’s still healing. Hold off on these until you’re fully back to normal:
- Dairy products: milk, cheese, ice cream, yogurt
- Fatty or greasy foods: fried food, fast food, rich sauces
- Spicy or highly seasoned foods
- Acidic foods: tomatoes, citrus fruits, vinegar-based dressings
- Coffee and alcohol
- Carbonated drinks: the bubbles worsen bloating, gas, and indigestion
- Sugary foods and candy
Dairy deserves special attention. The stomach flu frequently damages the cells in your small intestine that produce lactase, the enzyme you need to digest milk sugar. This means you can develop a temporary lactose intolerance even if you’ve never had trouble with dairy before. Symptoms like bloating, cramping, and diarrhea after eating dairy are common in the weeks following a stomach bug. This typically resolves within three to four weeks as the intestinal lining heals, but in the meantime, dairy products can make you feel like you’re still sick.
What to Feed Children After the Stomach Flu
Children follow the same general progression as adults, with a few important differences. Breastfed infants should continue breastfeeding throughout the illness and recovery. Breast milk provides both hydration and immune support, and there’s no reason to stop. Formula-fed infants should continue their regular formula at full strength. Diluting formula is not recommended because it reduces the calorie and nutrient content babies need.
For older children, an oral rehydration solution is a better choice than juice, sports drinks, or soda during the fluid-only phase. Once they’re ready for food, the same bland options work well: rice, bananas, toast, plain noodles, chicken. The key difference is that children are more vulnerable to dehydration and nutritional deficits, so you want to reintroduce a varied diet as soon as they can tolerate it rather than keeping them on a restricted list for days.
Probiotics During Recovery
There’s reasonable evidence that certain probiotics can shorten the duration of diarrhea after a stomach bug. In studies involving children with rotavirus, one well-studied probiotic strain reduced diarrhea by about two days compared to placebo. Another strain cut diarrhea duration by roughly 25 hours. Most of this research has been done in children, and the results vary by strain, so not all probiotic supplements are equally useful.
If you want to try probiotics, look for products containing Lactobacillus rhamnosus GG or Saccharomyces boulardii, which have the strongest evidence behind them. You can also get probiotics from fermented foods like miso or kimchi once your stomach is ready for more complex flavors, though these may be too intense in the first day or two. Yogurt is a natural probiotic source, but since dairy can be problematic during recovery, it’s better to wait until you’ve confirmed you can tolerate milk products again.
A Realistic Recovery Timeline
Most people move through a predictable pattern. The first six hours after vomiting stops should be a stomach rest period with only small sips of water. From roughly six to 24 hours, you’re in the clear-fluids phase: broth, oral rehydration drinks, and water. By 24 to 48 hours, most people can handle bland solids. By day three or four, you’re usually expanding back toward your normal diet.
Full recovery of your gut lining takes longer than you might expect. Even after you feel fine, the intestinal cells that were damaged by the virus need three to four weeks to fully regenerate. During that window, you may notice that rich foods, large meals, or dairy sit differently than they used to. This is normal and temporary. If diarrhea, cramping, or food intolerance persists beyond a month, something other than residual stomach flu damage may be going on.