Back to Learn
Sleep
5 min read

Why Do Newborns Grunt While Sleeping?

Newborn grunting during sleep is usually normal. Learn the common causes, what’s normal, and red flags that mean you should call a clinician.

Why Do Newborns Grunt While Sleeping?

Important: This page is educational and not a diagnosis. If your baby is struggling to breathe, turning blue/grey, feeding poorly, or seems very unwell, seek urgent medical care.

Why Do Newborns Grunt While Sleeping?

If you’re hearing your newborn grunt, strain, squirm, or make tiny “ugh/ehh” sounds in their sleep, you’re not alone—and most of the time, it’s normal.

Newborns are often noisy sleepers. Their breathing patterns are different from adults, their digestion is brand-new, and they’re still learning how to coordinate basic things like pooping, passing gas, swallowing, and breathing smoothly. The result can sound intense at 2:47am… even when everything is fine.

Let’s break down the most common reasons, what’s normal, and when grunting is a sign you should get help.

The 3 most common (normal) reasons newborns grunt in sleep

1) They’re learning to poop (yes, really)

One of the most common causes is infant dyschezia (sometimes casually called “grunting baby syndrome”).

This happens when a baby hasn’t yet learned how to coordinate pushing with relaxing—so they strain, grunt, turn red, and look uncomfortable… then pass a soft, normal stool. It can last 10–30 minutes and looks stressful, but it’s usually a coordination issue rather than constipation.

Clue it’s this: baby strains/grunts, face turns red, legs kick, then poop is soft or seedy (not hard pellets).

2) Normal newborn breathing patterns can sound weird

Newborn breathing isn’t always smooth and quiet. Many babies do periodic breathing—short pauses followed by a few faster breaths to “catch up.” Brief pauses can be normal when baby seems comfortable.

Also: newborn airways are small, so normal airflow can sound louder than you expect.

Clue it’s normal: baby is pink, comfortable, feeding well, and the grunting isn’t happening with every single breath.

3) They’re moving between sleep stages (active sleep is LOUD)

Newborns spend a lot of time in “active sleep” (similar to REM). During this stage they may:

  • grimace
  • twitch
  • squirm
  • grunt or sigh
  • briefly cry out

It can look like they’re waking up… then they settle again.

Clue it’s active sleep: eyes stay closed most of the time, and baby settles without fully waking.

When newborn grunting is NOT normal

Here’s the key distinction:

✅ Normal grunting

  • happens occasionally
  • often happens around gas/poop
  • baby is otherwise well: feeding, waking, and gaining weight

🚨 Concerning grunting (get checked)

Grunting that happens with each breath, or along with signs of breathing difficulty, can mean your baby is working harder to breathe and should be assessed by a clinician.

Red flags: seek urgent care now

Seek urgent medical help if your baby has any of these:

  • Blue/grey lips or skin
  • Breathing very fast or struggling to breathe
  • Skin pulling in around the ribs/neck (retractions), or nostrils flaring
  • Grunting that happens with every breath, especially if baby looks distressed
  • Baby is unusually sleepy/weak, feeding poorly, or seems seriously unwell

If you’re ever unsure, it’s okay to be cautious. With newborn breathing, trust your instincts.

Need help understanding your baby’s cries?

Try MyBabySoothe to record your baby’s cry, get AI-guided insight, and follow calm soothing steps.

Try MyBabySoothe

“Is it reflux?” Sometimes — but don’t assume

Reflux is common in babies, and it can cause discomfort, back arching, or frequent spit-up. But grunting alone doesn’t automatically mean reflux.

A helpful rule:

  • If the grunting is mostly straining + gas + poop, it’s often digestion/coordination.
  • If grunting comes with painful feeds, frequent spit-up, or poor weight gain, reflux is worth discussing with your pediatrician.

(If you’re exploring this next, see: /learn/is-newborn-reflux-normal.)

What you can do tonight (safe, practical tips)

If your baby is otherwise well and you’re not seeing red flags:

For digestion/grunting

  • Give it time — many babies grow out of this as coordination matures.
  • Try gentle comfort: holding, rocking, soothing voice
  • After feeds, keep baby upright briefly (if your pediatrician recommends it)

For sleep noise anxiety (you)

  • If you’re constantly waking to every grunt, consider moving the bassinet slightly farther (while staying safe-sleep compliant), or lowering monitor sensitivity.
  • Remember: noisy doesn’t equal unsafe. Distress signs matter more than volume.

Safe sleep reminder: Follow safe sleep guidance for your region (back to sleep, firm surface, no loose bedding).

FAQ

Is it normal for newborns to grunt and squirm all night?

Often, yes. Newborns spend a lot of time in active sleep and can be surprisingly loud. If baby is comfortable and feeding well, it’s typically normal.

What’s the difference between grunting while pooping vs grunting while breathing?

Pooping grunts come with straining, red face, and eventually a soft stool.
Breathing grunts tend to happen with each breath and may come with fast breathing, nostril flaring, or rib retractions—those need medical review.

How long does infant dyschezia last?

Many babies grow out of it as they learn coordination. If stools are soft and baby is otherwise well, it’s usually temporary.

When should I worry about newborn grunting?

If grunting happens with every breath, baby seems distressed, feeds poorly, or shows signs like blue lips/skin or labored breathing—seek urgent medical help.

Can grunting mean my newborn can’t breathe?

Sometimes grunting can be a sign baby is working to breathe more effectively—especially if paired with other breathing difficulty signs. If you suspect breathing distress, get checked urgently.

References (optional reading)

M

MyBabySoothe Team

Author

Need help understanding your baby’s cries?

Try MyBabySoothe to record your baby’s cry, get AI-guided insight, and follow calm soothing steps.

Try MyBabySoothe