The most important thing to give a toddler with a stomach bug is fluid, not food. Dehydration is the real danger with gastroenteritis in young children, and replacing lost fluids should be your top priority from the moment symptoms start. Food can wait until your child is ready, and when it does come back, their normal diet is the best option.
Start With Small Sips, Not Full Cups
A toddler who is vomiting will reject a full cup of anything. The key is giving tiny amounts of fluid at frequent intervals. For children over age 1, offer half an ounce to one ounce (about 1 to 2 tablespoons) every 20 minutes for the first few hours. If your child keeps that down, gradually increase the amount. If they vomit again, wait 30 to 60 minutes and restart with the same small sips.
This slow approach works because a stomach irritated by a virus can often tolerate a tablespoon of liquid even when it rejects a full drink. Patience matters here. It feels painfully slow, but those small sips add up over hours and can be enough to prevent dehydration.
Best Fluids to Offer
An oral rehydration solution (sold as Pedialyte or store-brand equivalents) is the standard recommendation because it contains the right balance of sugar and salt to help your child’s body absorb water efficiently. For mild to moderate dehydration, guidelines call for roughly 50 to 100 milliliters per kilogram of body weight over four hours, plus extra after each episode of vomiting or diarrhea. For a 25-pound toddler, that works out to roughly 20 to 40 ounces over four hours, though in practice you’ll give whatever your child will tolerate.
If your toddler refuses the taste of rehydration solution, diluted apple juice is a reasonable alternative for mild cases. A clinical trial published in JAMA found that children with mild gastroenteritis who received half-strength apple juice followed by their preferred fluids actually did better than children given electrolyte solution. Fewer of them needed IV fluids (2.5% versus 9%) and fewer experienced treatment failure overall. So if your child won’t touch Pedialyte, mixing apple juice with an equal amount of water is a practical backup.
Avoid full-strength juice, soda, and sports drinks. These have too much sugar relative to salt, which can actually worsen diarrhea by pulling more water into the gut. Plain water alone isn’t ideal either because it doesn’t replace the sodium and potassium your child is losing.
What to Feed Them (and What to Skip)
You may have heard of the BRAT diet: bananas, rice, applesauce, and toast. It’s been a go-to recommendation for decades, but current guidance from the National Institutes of Health is clear: restricted diets don’t help treat viral gastroenteritis. Research shows no benefit to limiting foods this way.
Instead, offer your toddler their normal foods as soon as their appetite returns. That might be pasta, chicken, bread, fruit, yogurt, or whatever they usually eat. Many toddlers will naturally gravitate toward bland, starchy foods when they feel sick, and that’s fine. The point is not to force a restricted menu. If your child wants scrambled eggs or a banana, both are good choices. Breast milk or formula should continue as usual for children still drinking either one.
Don’t push food while your toddler is actively vomiting. Focus on fluids first. Appetite typically returns within 12 to 24 hours, and it’s normal for your child to eat less than usual for several days.
Medications to Avoid
Anti-diarrheal medications like loperamide (Imodium) are not safe for toddlers. Both the World Health Organization and the American Academy of Pediatrics recommend against their use in young children. A systematic review found that serious side effects, including dangerous drowsiness, bowel obstruction, and in one case death, occurred only in children under 3. These drugs don’t kill the virus or rehydrate your child. They just slow gut movement, which at best shortens diarrhea by about a day while introducing real risks.
Bismuth subsalicylate (Pepto-Bismol) contains an ingredient related to aspirin and carries a risk of Reye’s syndrome in children. It should not be given to toddlers.
There is no antiviral medication for common stomach bugs. The illness has to run its course, which typically takes 1 to 3 days for vomiting and up to a week for diarrhea.
Probiotics: Possibly Helpful
Some evidence supports certain probiotic strains for shortening the duration of diarrhea in children with gastroenteritis. The strains with the most research behind them are Lactobacillus rhamnosus GG (found in Culturelle for Kids), Saccharomyces boulardii (Florastor Kids), and Lactobacillus reuteri. These are generally considered safe for toddlers, though the benefit is modest. They won’t stop the illness, but they may reduce how many days of diarrhea your child experiences. If you want to try one, look for a product that specifically names one of these strains on the label.
How to Spot Dehydration
Mild dehydration often shows up only as decreased urine output. If your toddler is producing fewer wet diapers than usual but is otherwise alert and has tears when crying, they’re likely mildly dehydrated and you can manage it at home with steady fluid intake.
Moderate dehydration looks more concerning: a dry mouth and lips, no tears when crying, skin that feels less elastic than usual, a faster heartbeat, and unusual irritability or fussiness. Your child may seem listless or clingy in a way that goes beyond normal sick behavior. At this stage, push oral rehydration solution more aggressively using the small-sip method and contact your pediatrician if your child isn’t improving within a few hours.
Fewer than three wet diapers in 24 hours, sunken eyes, or a sunken soft spot on the skull are signs of more serious fluid loss that need medical attention promptly.
Red Flags That Need a Doctor
Most stomach bugs resolve on their own, but certain symptoms signal something more serious. Contact your pediatrician or go to urgent care if your toddler has:
- Persistent vomiting that continues even after you’ve tried the small-sip rehydration method for several hours
- High fever lasting several days
- Blood in the stool or vomit
- Severe abdominal pain that doesn’t come and go with waves of nausea but stays constant
- Signs of significant dehydration that aren’t improving with oral fluids
Keeping the Bug From Spreading
Stomach viruses, especially norovirus, are extremely contagious and surprisingly hard to kill. Standard hand sanitizer doesn’t reliably eliminate norovirus. Wash your hands and your toddler’s hands with soap and water frequently, especially after diaper changes and before preparing food.
For cleaning up vomit or diarrhea, regular household cleaners aren’t enough. The CDC recommends a bleach solution: 5 to 25 tablespoons of standard household bleach (5% to 8% concentration) per gallon of water. Wear gloves, wipe the area with paper towels first and bag them, then apply the bleach solution and let it sit for at least five minutes before wiping clean with soap and hot water. Wash any contaminated clothing or bedding on the hottest cycle your machine offers.
Your toddler can remain contagious for two to three days after symptoms stop, so keep up the handwashing routine even once they seem fully recovered.