Why Is My Breastfed Baby So Gassy? 8 Causes & Fixes

Breastfed babies are gassy because they swallow air during feeding, because certain foods in the mother's diet increase gas production in the baby's digestive system, or simply because their immature gut is still developing the bacteria and enzymes needed to process milk efficiently.

Also Read: Why Is My Toddler So Clingy? 8 Causes & What to Do

Is a Gassy Breastfed Baby Normal?

All breastfed babies are gassy — the question is degree. Newborns and young infants pass gas up to 15 to 20 times a day as a normal part of digestion. Excessive gassiness that causes visible pain, prolonged crying, or feeding refusal is the threshold where investigation is warranted.

A baby's digestive system is not a miniature adult system — it is a work in progress. The gut microbiome is being assembled from scratch, digestive enzymes are present in limited quantities, and the nervous system controlling gut motility is still maturing. Gas is an expected byproduct of this developmental process, not a sign that something is wrong.

The American Academy of Pediatrics notes that gassiness is one of the most common concerns parents raise in the first months of life, and that the majority of cases resolve on their own as the infant's digestive system matures, typically by 3 to 4 months of age.

"Infant gas is normal and usually not a cause for concern. Most babies pass gas 13–21 times a day. Gas pain can occur if the baby has difficulty passing gas, which may cause fussiness and pulling up of the legs." — American Academy of Pediatrics at healthychildren.org

8 Reasons Your Breastfed Baby Is So Gassy

These eight causes cover the full range of infant gas in breastfed babies. Latch and feeding position account for the majority of cases in the first six weeks.

Is the Latch Shallow or Incorrect?

A poor latch is the number one cause of excessive gas in breastfed newborns. When a baby cannot get a deep, comfortable seal around the areola, they take in air alongside the milk with every swallow. This air pools in the stomach and intestines, causing visible discomfort — the baby arches, grunts, and pulls off the breast repeatedly.

Signs of a poor latch: clicking sounds during feeding, visible air bubbles at the corner of the mouth, milk leaking during the feed, or nipple pain for the mother. A certified lactation consultant (IBCLC) can assess and correct latch issues in a single session with significant improvement.

Is Your Baby Feeding Too Fast?

When milk flows very quickly — a strong let-down reflex or an oversupply of milk — babies gulp faster than they can coordinate swallowing. This leads to large air intakes between each gulp. Signs of a fast let-down: the baby chokes, sputters, unlatches during active letdown, and swallows audibly and rapidly.

Fixes: Try feeding in a laid-back or reclined position so gravity slows the flow. Hand-express for 30–60 seconds before latching to release the initial forceful let-down before the baby takes over.

Is Foremilk/Hindmilk Imbalance a Factor?

Breast milk changes composition during a feeding session: foremilk (the first milk released) is higher in lactose and lower in fat; hindmilk (the milk later in the session) is richer in fat and more filling. If a baby feeds frequently but briefly from multiple sides, they may receive a disproportionate amount of foremilk — high in lactose — which ferments more readily in the immature gut and produces gas.

Fix: Allow the baby to fully empty one breast before offering the other so they reach the richer hindmilk.

Are Specific Foods in Your Diet Contributing?

Breastfeeding mothers often worry that their diet is causing their baby's gas. The research on this is more nuanced than the commonly cited lists suggest. Most foods do not cause gas in breastfed babies because dietary gas-forming compounds do not pass into breast milk in significant quantities. However, some infants are sensitive to specific proteins — particularly cow's milk protein and, less commonly, soy, eggs, or tree nuts — that do transfer through breast milk.

Signs of a dietary sensitivity (vs. normal gassiness): blood or mucus in stool, green frothy stool, persistent eczema, and gas that does not improve between 3 and 4 months.

Also Read: Why Is My Baby Crying While Breastfeeding? Causes & Fixes

Is the Baby Swallowing Air From a Bottle?

If any bottle feeding is involved, gas increases when the nipple flow rate is too fast for the baby's age, or when the bottle is held at an angle that lets air enter the nipple. Use slow-flow nipples for infants under 3 months and pace-feed in an upright position to minimize air intake.

Does the Baby Need More Frequent Burping?

Newborns have a limited capacity to move swallowed air through their digestive system independently. Burping after every 2–3 minutes of nursing or after each breast, rather than only at the end of the feed, removes swallowed air before it travels further down the intestine and causes cramping.

Effective burping positions: upright on the shoulder (gentle back pat), face-down across the lap (gentle rubbing), or sitting upright with chin supported (allow the back to straighten and bow naturally).

Is This Colic Rather Than Simple Gas?

Colic is defined as crying for more than 3 hours a day, more than 3 days a week, for more than 3 weeks in an otherwise healthy baby. Gassiness and colic often coexist because the crying itself causes air swallowing, which worsens gassiness. If the baby is inconsolable in the late afternoon and evening on a regular pattern, colic (rather than diet or latch) may be the primary driver.

Is the Gut Microbiome Still Developing?

The infant gut microbiome is established over the first weeks and months of life. The bacteria responsible for fermenting certain carbohydrates in human milk are still colonizing the gut in newborns. The result: more gas, more discomfort, more variability in stool frequency. This resolves naturally. Probiotic drops containing Lactobacillus reuteri have been shown in some studies to reduce crying in colic and may modestly reduce gas, though evidence is ongoing.

"Infantile colic is characterized by paroxysmal crying in an otherwise healthy, well-fed infant. Excessive intestinal gas is a contributing factor in many cases, but the primary mechanism involves immature gut motility regulation and developing pain sensitivity in the infant nervous system." — American Family Physician at aafp.org

Baby Gas Relief: Quick Reference by Cause

In Short

Most breastfed baby gas is caused by swallowed air from a shallow latch or fast let-down — fixing the latch and feeding position is the single most impactful change you can make. Gas from the mother's diet is less common than widely believed and usually only involves cow's milk protein sensitivity. If the baby is gaining weight well and has periods of contentment between gas episodes, this is developmental and will resolve by 3 to 4 months.

What You Also May Want To Know

Should I stop eating certain foods if my breastfed baby is gassy?

Not necessarily. Unless there are clear signs of a dietary sensitivity (blood in stool, persistent green frothy stool, or eczema alongside the gas), eliminating foods is rarely needed. Start by addressing latch and feeding position. If you do eliminate dairy as a trial, allow 2–4 weeks for the protein to fully clear from your milk before assessing results.

Do gripe water or gas drops actually work?

Simethicone gas drops (like Mylicon) are generally safe and may help relieve gas already present in the intestine by helping bubbles merge and pass more easily. Evidence for effectiveness is mixed — they work for some babies and not others. Gripe water contains herbs and should be used cautiously; some formulations contain ingredients not recommended for young infants. Always consult your pediatrician before using either product.

When should I be concerned about my baby's gas?

See your pediatrician if the baby shows: blood or mucus in stool, significant weight loss or failure to gain weight, persistent green frothy stool, or crying that cannot be consoled for more than 3 hours daily. These symptoms suggest something beyond normal developmental gas and warrant evaluation for cow's milk protein intolerance or other conditions.

Does a breastfed baby need to be burped?

Yes, though less urgently than bottle-fed babies since breastfed babies typically swallow less air. Burp at natural pauses in feeding — when switching breasts or when the baby pulls off spontaneously. If the baby falls asleep at the breast without burping and wakes soon after seeming uncomfortable, a gentle upright burp session often helps.

Reviewed and Updated on June 5, 2026 by George Wright