After your baby vomits, the key is to start with small amounts of liquid, wait to confirm they can keep it down, and gradually work back to normal feeding over several hours. The specific approach depends on whether your baby is breastfed, formula-fed, or eating solids, and whether the vomiting was a one-time event or keeps happening.
The First Hour: Start Small
Your instinct may be to feed your baby right away, but offering too much too soon often triggers another round of vomiting. At the start of an illness, it’s common for babies to vomit everything for three or four hours. During that initial stretch, the goal isn’t a full feeding. It’s getting tiny amounts of fluid in and keeping them there.
If your baby is breastfed and has only vomited once, nurse for half your usual time every one to two hours. If vomiting has happened more than once, shorten feeds to five minutes every 30 to 60 minutes. This keeps breast milk coming in but avoids overwhelming the stomach.
For formula-fed babies who vomit once, continue with regular formula but offer smaller amounts per feeding. If vomiting continues, switch to an oral rehydration solution (ORS) like Pedialyte. Use a spoon or syringe to give 1 to 2 teaspoons (5 to 10 mL) every five minutes. This slow-drip method works surprisingly well. Over 90% of vomiting children can be successfully rehydrated this way, even when it seems like nothing is staying down.
If your baby is bottle-fed with pumped breast milk and vomits more than once, reduce to 1 ounce every 30 to 60 minutes. If that doesn’t stay down either, drop to 1 to 2 teaspoons every five minutes. Only switch to ORS if your baby can’t tolerate breast milk at all.
Building Back Up: The 4-Hour and 8-Hour Marks
Once your baby has gone two hours without vomiting, you can double the amount of fluid you’re offering. After four hours with no vomiting, return to regular breastfeeding or formula feeding. These are your two key checkpoints for liquid feeds.
Solid foods follow a slower timeline. Stop all solids and baby food while your baby is actively vomiting. After eight hours with no vomiting, you can start reintroducing them gradually. Begin with bland, soft foods your baby already tolerates well, and offer small portions. Their stomach will handle smaller meals better than a full serving right away.
What to Offer (and What to Skip)
For babies under one year, the safe options are breast milk, properly mixed formula, and ORS. That’s essentially the full list. Do not give plain water to young infants (except as part of mixed formula), as it doesn’t replace the electrolytes lost through vomiting and can be dangerous in large amounts.
Avoid fruit juices, sugary drinks, sodas, teas, and broths. High-sugar liquids can actually pull more water into the gut and make things worse. Once your baby is ready for solids again, skip greasy or fried foods and anything with a lot of added sugar.
You may have heard of the BRAT diet (bananas, rice, applesauce, toast) as the go-to for sick stomachs. Pediatricians no longer recommend following it strictly. The American Academy of Pediatrics considers it too restrictive, lacking key nutrients like protein, calcium, and vitamin B12. Sticking to BRAT foods for more than 24 hours may actually slow your child’s recovery. Those foods are fine as part of the mix, but once your baby is tolerating food, return to their normal age-appropriate diet as soon as they seem ready. The variety of nutrients helps their gut heal faster.
Spotting Dehydration Early
The biggest risk from vomiting isn’t the vomiting itself. It’s dehydration. In babies, the signs can be subtle at first but become serious quickly. Watch for fewer wet diapers than usual, no tears when crying, a sunken soft spot on the top of the head, sunken eyes, and unusual drowsiness or irritability. A fast heartbeat or rapid breathing are also warning signs. If you notice any of these, your baby needs medical attention promptly.
Counting wet diapers is the simplest tracking tool you have. If your baby is producing noticeably fewer wet diapers than a typical day, that’s an early signal to increase fluid intake using the small, frequent method described above, and to call your pediatrician if it doesn’t improve.
When Vomiting Signals Something More Serious
Most vomiting in babies is caused by a stomach virus and resolves within 24 hours. But certain signs mean you should seek care right away.
- Green vomit: Bile-colored (green, not just yellow stomach acid) vomit can indicate a bowel obstruction and requires emergency evaluation.
- Blood in the vomit that isn’t from a nosebleed warrants an ER visit.
- Fever in babies under 12 weeks: Any fever in a very young infant alongside vomiting needs prompt medical attention.
- High fever: A temperature above 104°F (40°C) at any age.
- Vomiting everything for more than 8 hours despite offering ORS or breast milk in small amounts.
- Vomiting lasting more than 24 hours: At that point, more serious causes need to be considered.
For babies under 12 weeks old, vomiting two or more times (beyond normal spit-up) is enough reason to call your doctor, even without other symptoms. Young infants have less margin for fluid loss, and what looks like a mild stomach bug in an older baby can become a bigger problem quickly in a newborn.