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How do you care for a toddler with a stomach bug?
Stomach bug in toddlers: how to give fluids after vomiting, what to feed once it settles, signs of dehydration, when to call the doctor, and stopping spread.
The short answer
Give small, frequent sips of an oral rehydration solution, a teaspoon or two every few minutes. Keep breastfeeding or offer formula or milk as tolerated. Once vomiting slows, return to normal foods. Watch for dehydration: few wet diapers, no tears, a dry mouth or unusual sleepiness. Wash hands with soap; sanitizer doesn't kill some stomach viruses.
Care for a toddler with a stomach bug by replacing fluids in tiny amounts: give a teaspoon or two of an oral rehydration solution every few minutes, and slowly increase as they keep it down. Offer usual foods once vomiting eases, and watch closely for dehydration. KidsHealth's guide to gastroenteritis says most cases are caused by viruses, last a few days, and the main job at home is preventing dehydration (Gastroenteritis, accessed November 12, 2026).
What it usually looks like
A "stomach flu" isn't influenza. It's an infection of the gut, often from norovirus or rotavirus. Typical pattern:
- Sudden vomiting, often first, sometimes many times in a few hours.
- Watery diarrhea that may start a day later and can linger for a week.
- Belly cramps, low fever, tiredness, not wanting to eat.
Vomiting usually settles within a day. Diarrhea can last longer.
Fluids: the step-by-step
- Start tiny. One teaspoon (5 mL) of oral rehydration solution every few minutes. A syringe or spoon works better than a cup, because big gulps come right back up.
- Build up. If they keep it down, slowly increase the amount. Keep going.
- If they vomit again, go back to one teaspoon every few minutes.
- Breastfed babies and toddlers can keep nursing, in shorter, more frequent feeds.
Rehydration solutions have the right balance of salt and sugar. Popsicle versions are great for kids who refuse to drink. Plain water alone isn't enough for a lot of vomiting and diarrhea, and full-strength juice and sports drinks have too much sugar, which can worsen diarrhea.
Food, once vomiting slows
You don't need a special diet. Once your child keeps fluids down for several hours and is hungry, offer normal, easy foods in small portions: toast, rice, bananas, crackers, pasta, yogurt, soup, eggs. Skip greasy or very sugary food for a day or two. KidsHealth notes there's no need to avoid dairy unless it makes the vomiting or diarrhea worse, and to avoid fatty foods because they can worsen diarrhea (Gastroenteritis, accessed November 12, 2026). Don't worry if they barely eat for a day; fluids matter more.
Signs of dehydration
KidsHealth's dehydration page lists the signs to watch in young children (Dehydration, accessed November 12, 2026):
- Fewer wet diapers than usual
- Dry or sticky mouth
- No tears when crying
- Sunken eyes
- Unusual sleepiness, drowsiness or crankiness
Mild signs mean more frequent sips. Moderate or severe signs mean calling the doctor or going in.
Call the doctor or go to the ER if
- vomit is green, bloody, or looks like coffee grounds;
- there's blood in the stool;
- belly pain is severe, constant, or in the lower right side;
- your child can't keep down even small sips for several hours;
- signs of dehydration appear;
- your child is very sleepy, hard to wake, or confused;
- there's a high fever, or it lasts more than a couple of days;
- vomiting lasts more than 24 hours, or diarrhea more than several days.
Babies under 6 months and children with health conditions should be checked sooner.
Stopping it from spreading
Stomach viruses spread fast through families and daycares.
- Soap and water. Wash hands for 20 seconds after every diaper and before food. Alcohol sanitizer doesn't reliably kill norovirus.
- Bleach for cleanup. Clean vomit and diarrhea messes with a diluted bleach solution, following the label. Wear gloves.
- Hot laundry. Wash soiled sheets and clothes on hot and dry on high.
- Separate towels. Each person uses their own.
- Hold off on cooking for others while sick and for a couple of days after.
Back to daycare
KidsHealth says to keep kids out of school or childcare until it's been more than 24 hours without vomiting or fever and diarrhea has gotten better (Gastroenteritis, accessed November 12, 2026). Ask your center's rule too.
Getting through the night
Line the bed with a towel over a waterproof pad, keep a bowl and a change of pajamas nearby, and sleep within earshot. It's exhausting. Tag-team with another adult if you can.
The day after
Kids bounce back fast once the bug passes. If an illness ends in a hospital visit for fluids, some children want to talk it through. A personalized getting-better book can retell the IV and the ride home in a calm, familiar way. See the hospital book.
Cleaning up safely
Stomach viruses spread easily from vomit and diapers, and some survive on surfaces for days.
- Wear disposable gloves if you have them.
- Pick up the mess with paper towels and put them straight into a plastic bag.
- Clean the area with soap and water, then disinfect with a bleach-based cleaner, following the label. Many household wipes don't kill norovirus.
- Wash soiled clothes and bedding on the hottest setting the fabric allows, and dry them on high heat.
- Wash your hands well with soap and water afterward. Hand sanitizer works less well against these viruses.
Keep a "sick kit" ready during winter: gloves, a bucket, old towels, a bleach cleaner, electrolyte drink and a spare sheet set. When it hits at 2 a.m., you'll be glad it's in one place.
Related reading
- How much water should a toddler drink?
- How to give a toddler liquid medicine
- What to pack for daycare
FAQ
Should I give anti-vomiting medicine?
Not without your doctor's advice. Over-the-counter anti-diarrhea medicines aren't recommended for young children.
Is it food poisoning or a virus?
Hard to tell. Several people sick within hours of the same meal suggests food. Care is the same.
How long is my toddler contagious?
Often for several days after symptoms end. Keep up the handwashing.
