Most babies spit up, and most of the time it’s completely normal. Reflux happens because the muscle at the top of a baby’s stomach isn’t fully developed yet, allowing milk to flow back up into the esophagus. You can’t eliminate reflux entirely, but a handful of simple changes to how and when you feed your baby can reduce how often it happens and how uncomfortable it is.
Why Babies Get Reflux
In adults, a ring of muscle at the bottom of the esophagus acts like a one-way valve, opening to let food into the stomach and closing to keep it there. In newborns, this muscle is still maturing. It relaxes at the wrong times, letting stomach contents slide back up. A baby’s stomach is also tiny and fills quickly, which makes overflow more likely after a feeding.
This is why reflux peaks in the first few months of life and gradually improves as the digestive system strengthens. Most babies outgrow frequent spitting up by 12 to 18 months. In the meantime, the strategies below focus on reducing pressure in the stomach and keeping milk moving in the right direction.
Feed Smaller Amounts More Often
An overfull stomach is the single biggest trigger for reflux episodes. When more milk goes in than the stomach can comfortably hold, the excess has nowhere to go but back up. Instead of larger, less frequent feedings, try offering smaller volumes on a shorter schedule. For formula-fed babies, this might mean reducing each bottle by an ounce or so and feeding every two to two and a half hours rather than every three. For breastfed babies, you can try nursing on one side per session or shortening the time at each breast, then offering the other side sooner.
The total amount your baby eats over the course of a day stays roughly the same. You’re just spreading it out so the stomach never gets too full at once.
Burp Frequently During Feedings
Swallowed air takes up space in the stomach, and when a bubble of air comes back up, it often brings milk with it. Burping regularly throughout a feeding, not just at the end, helps release that air before it builds up.
For formula-fed babies, pause to burp after every 1 to 2 ounces. If you’re breastfeeding, burp when you switch breasts or, if your baby tends to take a natural pause, use that moment. Some babies burp easily with a few gentle pats on the back while sitting upright on your lap. Others do better over your shoulder. If no burp comes after a minute or two, it’s fine to continue feeding and try again.
Keep Your Baby Upright After Eating
Gravity is a simple but effective tool. Laying a baby flat right after a feeding makes it easy for milk to flow back toward the esophagus. Holding your baby upright for 15 to 20 minutes after each feeding gives digestion a head start and lets the stomach begin to empty before your baby lies down.
This doesn’t need to be complicated. Holding your baby against your chest, carrying them in an upright position, or even sitting them in your lap with their head supported all work. The key is keeping the stomach below the esophagus long enough for the initial wave of digestion to pass.
What Not to Do at Sleep Time
It seems logical that propping a baby up at an angle would help reflux while they sleep, but the American Academy of Pediatrics specifically warns against this. Elevating the head of a crib is not effective at reducing reflux, and it increases the risk of a baby sliding into a position that can obstruct breathing. Inclined sleepers, car seats used for sleeping, swings, reclined bouncy seats, and sleep positioners are all unsafe sleep environments for the same reason.
There is also evidence that a semi-inclined position can actually make reflux worse. The safest sleep position for a baby with reflux is the same as for any baby: on their back, on a flat, firm surface, with no loose bedding or objects in the sleep area.
Consider Cow’s Milk Protein
In some babies, what looks like reflux is partly driven by a sensitivity to cow’s milk protein. The symptoms overlap almost entirely: spitting up, irritability, back arching, and feeding refusal can all stem from either reflux or a milk protein reaction. This overlap makes it easy to miss.
If you’re breastfeeding, a doctor may suggest removing dairy from your diet for two to four weeks to see if symptoms improve. The protein passes through breast milk, so even exclusively breastfed babies can be affected. If you’re formula feeding, switching to an extensively hydrolyzed formula, where the milk proteins are broken into much smaller pieces, can help. One small study found that infants with reflux symptoms who switched to a hydrolyzed formula showed significant clinical improvement. Their stomachs also emptied faster: average emptying time dropped from 205 minutes on standard formula to 167 minutes on the hydrolyzed version, moving closer to the 124 minutes seen in babies without reflux.
This isn’t a change to make on your own. If you suspect cow’s milk protein is playing a role, it’s worth discussing with your baby’s pediatrician so you can track the results of an elimination trial properly.
Thickening Feeds
Adding a small amount of cereal to formula is a common recommendation for reflux, and it can reduce visible spitting up by making the liquid heavier and harder to regurgitate. Rice cereal has traditionally been used for this purpose, though there are growing concerns about arsenic levels in rice products. Oatmeal cereal is generally considered a safer alternative and is approved for use in babies over four months at some major children’s hospitals.
There are practical downsides to be aware of. Thickened formula clogs standard bottle nipples (you’ll likely need a cross-cut or faster-flow nipple), and the mixture continues to thicken over time, so you’ll want to prepare bottles fresh. Cereal-thickened formula can also contribute to constipation. One important limitation: you cannot thicken breast milk with cereal, because a natural enzyme in breast milk breaks down the starch, turning it back into liquid.
Gel-based thickeners marketed for infants should not be used in babies under one year old or in any baby born prematurely, due to a risk of a serious intestinal condition. Always check with your pediatrician before thickening feeds.
Feeding Position and Latch
Feeding your baby in a more upright position, rather than cradled flat, uses gravity to help milk move downward during the feeding itself. For breastfeeding, a laid-back position where you recline slightly and baby feeds from on top of you, or a straddle hold where baby sits upright facing the breast, can both reduce the amount of air swallowed and slow the flow of milk. For bottle feeding, keeping the bottle tilted just enough to fill the nipple with milk (rather than air) and pacing the feeding by taking regular breaks helps prevent gulping.
Normal Reflux vs. Something More Serious
Simple reflux, where a baby spits up but is otherwise happy, growing well, and eating normally, is sometimes called a “laundry problem” rather than a medical one. It’s messy but harmless. Gastroesophageal reflux disease (GERD) is different. It’s diagnosed when reflux causes complications or significant discomfort.
Signs that reflux may have crossed into GERD territory include:
- Back arching or abnormal neck movements during or after feeds
- Choking, gagging, or difficulty swallowing
- Persistent irritability that’s clearly linked to feeding or spitting up
- Refusing to eat or a noticeable drop in appetite
- Poor weight gain or actual weight loss
- Chronic cough or wheezing without a respiratory illness
Some symptoms warrant more urgent attention. Vomit that contains blood or looks like coffee grounds, vomit that is green or yellow (indicating bile), forceful projectile vomiting, no wet diapers for three or more hours, or vomiting that first appears before two weeks of age or after six months could signal a condition unrelated to reflux that needs prompt evaluation.