When you have a stomach bug, the best things to eat are bland, soft foods like plain rice, bananas, toast, crackers, mashed potatoes, plain noodles, and simple chicken. But what matters most in the first hours isn’t food at all. It’s fluids. Most people recover from viral gastroenteritis in one to three days, and the biggest risk during that window is dehydration from vomiting and diarrhea.
Start With Fluids, Not Food
Your first priority is replacing the water and electrolytes you’re losing. Small, frequent sips work better than gulping a full glass, which can trigger more vomiting. Water is fine, but it doesn’t replace the sodium and potassium your body is flushing out. Oral rehydration solutions (sold at pharmacies or mixed at home with water, salt, and sugar) are designed with a specific balance of glucose and sodium that helps your intestines absorb fluid more efficiently. Broth is another good option because it provides both sodium and liquid in a form that’s easy to keep down.
What you drink matters as much as how much. The CDC specifically warns against large amounts of soda, fruit juice, and gelatin desserts during gastroenteritis. These drinks are loaded with simple sugars, which create an osmotic effect in your intestines, essentially pulling more water into your gut and making diarrhea worse. If you want something with flavor, dilute apple juice with equal parts water, or stick to electrolyte drinks formulated for illness rather than sports.
When to Start Eating Again
There’s no set timer. Once you can keep clear fluids down for a few hours without vomiting, you can try small amounts of solid food. Don’t force it. Your appetite will return gradually, and eating too much too soon often leads to another round of nausea. Start with a few bites and see how your stomach responds over 30 to 60 minutes before eating more.
The Best Foods During Recovery
You’ve probably heard of the BRAT diet: bananas, rice, applesauce, and toast. It’s a useful starting point, but it’s no longer the recommended approach on its own. The American Academy of Pediatrics considers a strict BRAT diet too restrictive, and Cleveland Clinic notes it lacks calcium, vitamin B12, protein, and fiber. Following it for more than a day or two can actually slow recovery, especially in children.
Think of BRAT foods as a category, not a complete list. You want bland, low-residue foods that are easy to digest. Good options include:
- Plain white rice or plain noodles: easy on the stomach and a source of simple carbohydrates for energy
- Mashed potatoes (without butter or cream): starchy and filling without being heavy
- Saltine crackers or plain toast: good for settling nausea and replacing some sodium
- Bananas: a natural source of potassium, which you lose through diarrhea and vomiting
- Plain chicken: baked or boiled, this adds protein back into your diet as your appetite returns
- Applesauce: gentle on the stomach and provides a small amount of sugar for energy
As soon as you feel ready, expand beyond these basics. Adding lean protein and cooked vegetables helps your gut lining repair itself faster than sticking to plain carbohydrates alone. The goal is to return to a normal diet within a day or two of your worst symptoms, not to restrict yourself longer than necessary.
Foods and Drinks to Avoid
Some foods are genuinely harder on your digestive system during a stomach bug. Fatty, greasy, or heavily spiced foods require more digestive effort and can trigger nausea. Fried foods, creamy sauces, and rich desserts should wait until you’re fully recovered.
Dairy is worth avoiding for a different reason. Viral gastroenteritis can temporarily damage the lining of your small intestine, reducing your body’s production of lactase, the enzyme that breaks down the sugar in milk. Without enough lactase, dairy products can pass through your gut undigested, worsening diarrhea through the same osmotic effect that makes sugary drinks problematic. This temporary lactose intolerance usually resolves on its own within a week or two, but during the acute illness, milk, ice cream, and soft cheeses tend to make things worse.
Caffeine and alcohol are also poor choices. Both are dehydrating, and caffeine can stimulate your intestines to move faster, which is the opposite of what you need. Raw vegetables, whole grains, nuts, and seeds are normally healthy, but their high fiber content can irritate an already inflamed gut.
Ginger for Nausea
If nausea is your main barrier to eating, ginger can help. A systematic review of clinical trials found that ginger was as effective as some prescription anti-nausea medications in certain settings, and consistently outperformed placebo. Ginger tea, ginger chews, or flat ginger ale (stir the carbonation out first) are all reasonable options. The key is using real ginger rather than artificial ginger flavoring, which has none of the active compounds.
Probiotics May Shorten Recovery
A meta-analysis of ten trials involving 740 patients found that probiotics reduced the duration of diarrhea from viral gastroenteritis by roughly 0.7 days, or about 17 hours. That’s not dramatic, but if you’re already miserable, shaving nearly a day off your symptoms is meaningful. Probiotic-containing yogurt is one option once you can tolerate small amounts of dairy, though capsule forms may be easier on your stomach during the worst of it. Look for products that list specific bacterial strains on the label rather than vague “probiotic blend” language.
Signs of Dangerous Dehydration
Most stomach bugs are uncomfortable but self-limiting. Dehydration is the complication that turns a miserable few days into something dangerous. Watch for dark yellow or amber urine, producing very little urine, a dry mouth and lips, dizziness when standing up, and a rapid heartbeat. These all indicate your body is running low on fluids. In severe cases, dehydration can cause confusion, extreme drowsiness, or cold and clammy skin, which signals your body is struggling to maintain circulation to vital organs. Children and older adults are especially vulnerable because they have less fluid reserve and may not recognize or communicate thirst effectively.
If you can’t keep any fluids down for more than several hours, or if you notice any of the severe symptoms above, you likely need professional help to rehydrate intravenously.