Why Does My Baby Make So Much Noise While Sleeping?
If you’re lying awake at 3 a.m. listening to your newborn grunt, squeak, and squirm while sleeping, you’re not alone—and more importantly, you’re not imagining things. Babies can be surprisingly noisy sleepers. For many new parents, this comes as a shock. Aren’t they supposed to sleep peacefully, like the pictures we see in parenting books?
The truth is: noisy sleep is a completely normal part of a newborn's development.
Why Are Babies So Noisy When They Sleep?
There are a few key reasons:
1. Newborns have immature sleep cycles.
Unlike adults, babies spend much more time in active sleep (also known as REM sleep). During this stage, they may move around, smile, frown, make noises, and even let out a little cry. This doesn’t necessarily mean they’re awake—it’s just part of their normal sleep rhythm.
2. They’re still learning how to breathe.
Newborns are obligate nasal breathers, and their airways are tiny. A little mucus or normal congestion can make their breathing sound loud or snorty, especially when they’re lying flat. It can sound alarming—but it usually isn’t.
3. Digestive systems are still developing.
Gurgles, grunts, and straining sounds often come from the belly. Your baby is still figuring out how to pass gas, poop, and move things through their digestive tract. These sounds are especially common if your baby is experiencing gas or a mild case of reflux.
4. Moro reflex and startles
Even while asleep, babies may jerk their arms, startle themselves awake, or let out a brief cry due to their Moro reflex. This too fades with time—usually by 3 to 4 months.
When Should You Be Concerned?
While noisy sleep is typically normal, there are a few signs that should prompt a call to your pediatrician:
Persistent coughing, wheezing, or labored breathing
Blue or dusky color around the lips or face
Significant pauses in breathing (more than 10 seconds)
Constant crying in sleep that doesn’t ease with soothing
When in doubt, always trust your instincts. It’s never a bad idea to bring it up at your next pediatrician visit.
How to Help Your Baby Sleep More Comfortably (and Give You Some Peace of Mind)
Elevate the head of the bassinet slightly (ask your pediatrician first) if your baby has mild reflux.
Use a humidifier in the room to help with dry air or mild congestion.
Practice gentle burping after feeds to minimize gas buildup.
Swaddle properly (if age-appropriate) to reduce startle reflexes.
Keep your baby close during the early weeks—room-sharing (not bed-sharing) can help you monitor sounds more easily.
Noisy sleep is a normal part of newborn life—and while it can be confusing and even concerning, it’s rarely a sign that something is wrong. As your baby grows, you’ll notice the sleep noises settle down. By the time they’re 3 to 6 months old, many of those grunts and squeaks will have faded away.
If you’re ever unsure, don’t hesitate to reach out to your pediatrician—or your baby nurse. Supporting parents through this phase is exactly what we’re here for.