Babies cry when they fart because they haven’t yet learned how to coordinate the muscles needed to push gas out, and the sensation of gas moving through their intestines is completely new to them. After nine months developing in fluid, newborns have zero experience with air in their digestive tract. Every bubble passing through is an unfamiliar, uncomfortable feeling, and crying is the only way they can respond.
The Muscle Coordination Problem
Passing gas sounds simple, but it actually requires your baby to do two things at once: tighten their abdominal muscles while relaxing the muscles around their anus. This is a learned reflex, and many babies haven’t figured it out yet. They push against a clenched bottom, which creates pressure and frustration, and they cry.
Here’s the interesting part: pediatricians believe the crying itself is actually functional. When your baby cries, it contracts their abdominal muscles, which builds the pressure needed to finally push the gas out. So while it looks like your baby is in distress, they may actually be using crying as a tool to get the job done. This is the same mechanism behind infant dyschezia, a common condition where babies strain and cry while trying to poop. It’s not a sign of pain or constipation. It’s a coordination problem that resolves on its own as your baby’s nervous system matures.
Why Gas Feels Worse for Babies
Adults barely notice gas moving through their intestines because they’ve had a lifetime to get used to it. Your baby hasn’t. Their gut is brand new, and the nerve endings lining their digestive tract are highly sensitive. Gas bubbles stretching the intestinal walls create a sensation that, to a baby, feels significant enough to cry about.
Research has also shown that some babies have heightened gut sensitivity compared to others. A study published in Neurogastroenterology & Motility found that the intestinal contents of colicky infants actually triggered greater nerve responses than those of non-colicky infants when tested in a lab setting. This suggests that for some babies, the discomfort from gas isn’t just about inexperience. Their gut may genuinely be more reactive, which could explain why certain babies seem far more bothered by normal digestive activity than others.
Swallowed Air Makes It Worse
The more air that gets into your baby’s stomach and intestines, the more gas has to work its way out. Babies swallow air constantly: during feeding, during crying, and sometimes just from breathing with their mouth open. A few common culprits make this worse.
A shallow latch during breastfeeding lets extra air slip in around the nipple. With bottles, a nipple flow that’s too fast causes gulping, and one that’s too slow makes your baby suck harder and pull in more air. Feeding in a very flat position can also trap air in the stomach instead of letting it rise for a burp. Frequent, thorough burping during and after feeds is one of the simplest ways to reduce the amount of gas that reaches the intestines in the first place.
How to Help Your Baby Pass Gas
Since the core problem is that your baby can’t coordinate their muscles well enough to move gas out efficiently, the most effective remedies involve helping them physically. Laying your baby on their back and gently cycling their legs in a pedaling motion puts rhythmic pressure on the abdomen and encourages trapped gas to move through the digestive tract. Gentle belly massage, using slow circular strokes in a clockwise direction (following the path of the intestines), can also help.
Tummy time, when your baby is awake and supervised, puts natural pressure on their belly that can help gas escape. Some parents find that holding their baby face-down along the forearm with gentle pressure on the stomach provides relief. Warm baths can relax the abdominal muscles enough to let gas pass more easily. None of these are instant fixes, but they reduce the amount of time your baby spends uncomfortable.
Gas Pain vs. Colic
Normal gas fussiness comes and goes. Your baby cries, passes gas, and then settles down. Colic is different: it’s defined as crying that lasts more than three hours a day, more than three days a week, in an otherwise healthy baby under three months old. Colicky episodes tend to cluster in the evening, roughly between 6 p.m. and midnight, with no clear trigger and no easy way to soothe them.
Gas symptoms specifically include fussiness, a visibly bloated belly, and frequent burping or flatulence. If your baby calms down after passing gas and is otherwise feeding well, gaining weight, and having normal stools, what you’re seeing is almost certainly normal newborn digestion at work.
Signs That Something Else Is Going On
Occasional crying with gas is normal. But a few patterns suggest something beyond routine digestive discomfort. Cow’s milk protein intolerance can cause bloating, gas, diarrhea (sometimes with blood in the stool), and general irritability. This affects both formula-fed babies and breastfed babies whose mothers consume dairy. If you notice loose or mucousy stools alongside the gas pain, a milk protein issue is worth exploring with your pediatrician.
Other signs to watch for include refusing to feed or drinking noticeably less milk than usual, vomiting that’s bright green (which can indicate an intestinal blockage), a belly that’s hard and bloated and causes your baby to scream when you press on it gently, or a fever above 100.4°F in a baby under three months. Constant, inconsolable crying where your baby won’t eat, play, or be distracted is also different from gas crying and needs prompt evaluation. A baby who cries, farts, and then goes back to being themselves is just learning how their body works.
When It Gets Better
Most babies start handling gas more comfortably between three and four months of age. By that point, their digestive system has had enough practice to move gas through more efficiently, and they’ve learned the muscle coordination needed to release it without a struggle. The gut itself also matures, becoming less reactive to the stretching and pressure that gas creates. Until then, what you’re seeing is a normal, temporary part of development. It’s uncomfortable for your baby in the moment, but it isn’t harmful, and it will pass.