Skip to content
BuyOnceRight: buy once, buy right
Baby Bottles · Troubleshooting

Baby Bottle Causing Gas: Common Causes and What to Try

Everything you need to know about baby bottle causing gas: common causes and what to try, explained plainly.

On this page
Step by step

How to fix it

Work through these in order, the most common causes come first.

  1. Start With Feeding Mechanics

    Bottle angle: Keep the bottle tilted so the nipple and neck stay filled with milk rather than air throughout the feed. This reduces swallowed air regardless of which bottle brand you're using and costs nothing to try. Flow rate: A flow that's too fast for your baby's stage can cause gulping, which increases swallowed air.

  2. Diagnosing Your Specific Problem

    Gassy regardless of feeding angle and burping adjustments: worth considering a dedicated anti-colic vent system, since the swallowed-air mechanism may still be significant even with good feeding technique. Nipple visibly collapses or flattens during feeds: the baby may be gulping air trying to compensate for restricted flow. Check the collar isn't overtightened, which can restrict venting, or try a different nipple.

  3. See Also

    Brown's Options+ Review - the most researched anti-colic vent system Best Baby Bottles for Colic - full category roundup Baby Bottle Leaking - related troubleshooting

Start With Feeding Mechanics

Bottle angle: Keep the bottle tilted so the nipple and neck stay filled with milk rather than air throughout the feed.

This reduces swallowed air regardless of which bottle brand you're using and costs nothing to try.

Flow rate: A flow that's too fast for your baby's stage can cause gulping, which increases swallowed air.

If your baby seems to gulp or choke slightly, drop to a slower flow nipple.

Burping routine: Burping partway through and at the end of a feed, adjusted to your baby's specific cues, helps release air that's already been swallowed during the feed.

Diagnosing Your Specific Problem

Gassy regardless of feeding angle and burping adjustments: worth considering a dedicated anti-colic vent system, since the swallowed-air mechanism may still be significant even with good feeding technique.

Nipple visibly collapses or flattens during feeds: the baby may be gulping air trying to compensate for restricted flow.

Check the collar isn't overtightened, which can restrict venting, or try a different nipple.

Gas alongside significant distress, feeding refusal, or other symptoms: this goes beyond typical feeding-related gas and is worth discussing with your pediatrician rather than adjusting bottles alone.

Gas improved somewhat but hasn't fully resolved: this is common.

See Also

Brown's Options+ Review - the most researched anti-colic vent system Best Baby Bottles for Colic - full category roundup Baby Bottle Leaking - related troubleshooting

Put it into practice

Top baby bottles we recommend

See all
Answers

Frequently asked questions

Can a baby bottle actually cause gas, or is that just marketing?

Swallowed air during feeding is a real, well-understood contributor to gas and fussiness in bottle-fed babies, which is why anti-colic vent systems exist. That said, gas has multiple potential causes beyond feeding mechanics, including normal digestive development, so a bottle alone isn't necessarily the only factor. Anti-colic vent systems are a legitimate approach to reducing one contributing cause, not a guaranteed fix for all gas.

Does bottle angle affect how much air a baby swallows?

Feeding with the bottle tilted so the nipple and neck stay filled with milk rather than air reduces the amount of air a baby swallows during a feed, regardless of which bottle brand you use. This is one of the simplest, free adjustments to try before assuming you need a different bottle.

Should I switch to an anti-colic bottle if my baby seems gassy?

It's a reasonable step if you've already checked flow rate, feeding angle, and burping routine and gas is still a persistent issue. Brown's Options+ has the most established research behind its internal vent system. Philips Avent and Comotomo use simpler valve-based venting that works well for many babies but is somewhat more position-dependent.

How often should I burp my baby during a feed?

A common general approach is to burp partway through a feed, for example after the first half of the bottle, and again at the end, adjusting based on your baby's individual cues like pulling away, fussing, or squirming. There's no single universal schedule that fits every baby, so watching your baby's specific signals matters more than a fixed rule.

Keep researching

Related guides & best picks