Why Does My Baby Grunt So Much? Normal vs When to Call

It’s 3 a.m. Your baby is asleep in the bassinet next to you, grunting, squeaking and straining like a tiny weightlifter, and you’re wide awake wondering if something hurts. If you’ve searched why does my baby grunt so much, here’s the reassuring part first: the American Academy of Pediatrics (AAP) says grunting or straining while pushing out a stool is normal in young babies, and noisy sleep is common. Below is a simple 3-question check to tell an everyday grunt from a breathing grunt, plus the signs that mean you should call your pediatrician or 911.

Noisy nights are part of sleep in the early months. For how sleep changes month by month, see our baby sleep schedule by age guide.

Quick answer: why do babies grunt so much?

Pooping: the AAP says grunting or straining while pushing out a stool is normal in young babies. Turning red in the face and drawing up the legs while straining is normal too.
Sleep: throat gurgling noises are likely to build up during sleep, and nasal noises are usually caused by dried mucus, not a cold (AAP).
Gas: passing gas and burping release swallowed air. The AAP says these are normal.
Not normal: new moaning or grunting noises with each breath. The AAP lists this as a reason to call 911.
Also urgent: ribs pulling in with each breath, bluish or gray lips or face, or a baby who is very hard to wake.
Fever under 12 weeks: call your doctor now, and don’t give fever medicine before your baby is seen (AAP).

The 3-question grunt check

When you hear a grunt, ask yourself three questions. Most everyday grunts pass all three.

1. When does it happen? With pooping, passing gas, stretching or light sleep is usually normal. With every single breath, over and over, is not.
2. How does your baby look? Relaxed between grunts, with normal color and feeding well, is reassuring. Working hard to breathe, ribs pulling in, nostrils flaring, or bluish or gray color means get help now.
3. Is it new, and does it come with other signs? Grunting that is new and comes with fever, poor feeding, unusual sleepiness or fast breathing is a reason to call your pediatrician.

Situation	Usually normal?	What you can do	Call your doctor if
While pooping or straining	Yes (AAP)	Give it time. Soft stools mean the straining is part of normal pooping	Stools are hard or painful to pass, or your baby is under 2 months and seems constipated beyond normal straining
During sleep	Yes, noisy sleep is common	Keep to safe sleep: on the back, on a firm, flat surface	Grunting comes with every breath, pauses in breathing last more than 10 seconds, or color changes
During or after feeds	Often	Pause to burp during and after the feed	Most feeds are a struggle with coughing, choking or hard breathing, or your baby isn’t gaining weight
With every breath, without stopping	No	Call 911 (AAP)	This is an emergency sign
Together with a fever	Needs a check	Under 12 weeks: call your doctor now and don’t give fever medicine first (AAP)	Any fever under 12 weeks, or grunting with fast or hard breathing at any age

Why do babies grunt when they poop?

Many young babies grunt, strain, go red in the face and pull their legs up when they poop. The AAP says all of this is normal in young babies. What matters more is what comes out. If the stool is soft, the effort is usually just part of pooping. If stools are hard, dry or painful to pass, see our guide to baby constipation.

Don’t give water, juice or any remedy to a young baby to help them poop without asking your pediatrician first. Babies under 6 months don’t need water.

Why does my baby grunt in their sleep?

Young babies are noisy sleepers. The AAP explains that throat gurgling noises tend to build up during sleep, and that nasal noises usually come from dried mucus rather than a cold. Newborns can also have short pauses in breathing of less than 10 seconds, called periodic breathing. The AAP says this usually settles by about 1 month of age.

Call your doctor or seek care now if your baby’s breathing stopped for more than 10 seconds, even if it is normal again, or if your baby is breathing fast or has turned blue (AAP).

The AAP recommends sharing a room with your baby, without sharing a bed, for at least the first 6 months. That means you will hear most of the squeaks and grunts. Knowing which sounds are normal can make those nights easier. More in our safe sleep practices guide.

Why does my baby grunt while feeding?

Small grunts, gulps and squeaks during a feed are common, especially when your baby swallows air. Pausing to burp during and after the feed can help with gas. Our guides to baby gas relief and baby hiccups cover what to try. If your baby often brings up milk, is unsettled during feeds or isn’t gaining weight, read our guide to baby reflux and talk to your pediatrician.

When grunting is a breathing sign

Grunting can also be a sign that a baby is working hard to breathe. The AAP lists new moaning or grunting noises with each breath among the reasons to call 911. In the UK, NICE lists grunting as a red, high-risk sign in its traffic-light system for young children with a fever.

Other signs of breathing trouble the AAP lists:

Ribs pulling in with each breath (retractions).
Breathing much faster than normal.
Lips or face turning bluish or gray.
Struggling for each breath, or barely able to cry.

In fall and winter, colds, RSV and bronchiolitis are common causes of breathing trouble in babies.

What you can do at home

Watch your baby’s chest and face for a minute while they are calm. Normal grunts come and go, and your baby looks comfortable in between.
Take a short video of the noise. It helps your pediatrician hear what you hear.
Burp your baby during and after feeds.
Keep to safe sleep: on the back, on a firm, flat surface, with nothing else in the crib.
Skip home remedies. Ask your pediatrician before giving water, juice or any medicine.

When to talk to your doctor

Call 911 (or 999 in the UK) if your baby makes new moaning or grunting noises with each breath, has bluish or gray lips, tongue or face, can’t be woken, or stops breathing.
Go to the ER or seek care now if your baby’s ribs pull in with each breath, your baby is under 1 year old and has trouble breathing, breathing is much faster than normal, or breathing stopped for more than 10 seconds and is now normal again.
Call your pediatrician now if your baby is under 12 weeks old and has a fever (don’t give fever medicine first), or if your newborn under 1 month looks or acts abnormal in any way.
Call within a day if your baby is under 2 months old and seems constipated beyond normal straining.
Ask at your next visit if the grunting worries you, even when everything else seems fine. See also when to call the pediatrician.

Frequently asked questions

Is it normal for a newborn to grunt all night?

Often, yes. Many newborns grunt, squeak and gurgle through the night, especially in light sleep or while passing gas or stool. It is not normal if the grunting comes with every breath or your baby is working hard to breathe.

What is grunting baby syndrome?

Some websites use this name for babies who grunt and strain to poop. The AAP doesn’t use the term. It simply says grunting or straining while pushing out a stool is normal in young babies.

When do babies stop grunting so much?

There’s no official age. Many parents notice the grunting eases as their baby gets older. If you’re unsure, ask at your next checkup.

Can grunting be a sign of reflux?

Grunting on its own isn’t a sign of reflux. If it comes with bringing up milk often, being unsettled during feeds or slow weight gain, talk to your pediatrician.

Should I wake my baby if they grunt in their sleep?

There’s no need if your baby is breathing comfortably and their color is normal. Do the 3-question check, and get help right away if you see any of the breathing signs above.

Is grunting with every breath an emergency?

Yes. The AAP lists new moaning or grunting noises with each breath as a reason to call 911.

Browse more health topics on our baby health and safety page.

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Sources

This article is for general information only and is not a substitute for medical advice. If you’re worried about your baby, call your pediatrician, or 911 in an emergency.