Have you walked into your nursery in your HDB or Condo and noticed your newborn baby sleeps with mouth open? It is a sight that makes many SG and MY mummies pause. While it might look like a natural behaviour at first, seeing your 2 month old baby consistently sleeping this way can spark worry. Since our little ones are still mastering their bodily functions, these tiny details often signal they need a bit of extra comfort.
Don't let the late-night Google searches keep you up. We have put together this guide to help you understand the "why" and "how" of infant mouth breathing, featuring practical tips and essential tools to ensure a peaceful night for your family in the tropical heat.
SEA Mummy Tip: In Singapore and Malaysia, our high humidity usually keeps nasal passages moist. However, 24/7 air-conditioning in the nursery can quickly dry out a baby’s delicate nose, leading to temporary mouth breathing.
The short answer is yes, it can be common, but it is not the ideal way for a baby to rest. Newborns are "obligate nose breathers," meaning their bodies are designed to breathe through the nose.
If there is a slight blockage in the nasal airway, they will naturally switch to mouth breathing to get enough oxygen. If it only happens during a bout of the sniffles, it is usually fine. But if your 2 month old baby sleeps with mouth open every single night, it is time to investigate the root cause.
Understanding why does my baby sleep with their mouth open is the first step toward better sleep. Several factors, ranging from the environment to physical traits, can play a role.
Babies cannot clear their own noses. Even a small amount of "hingus" (mucus) can block their tiny airways, especially after a day out at a humid park or a crowded shopping mall. When the nose is blocked, the mouth takes over.
Try this: Use a nasal aspirator for newborn. The Momcozy BreezyClear Pro™ 2-in-1 Spray & Suction Electric Nasal Aspirator is perfect for SG mummies who want a quick, hygienic way to clear congestion before bedtime.
2-in-1 Design
Hospital Grade Suction
Adjustable Suction
All-in-One Storage
2-in-1 Design
Hospital Grade Suction
4 Suction Levels
Mist Spray
While we need the AC to survive the heat, dry air can irritate the nasal lining. This leads to swelling and mucus build-up, forcing the baby to breathe through their mouth.
Try this: A newborn sound machine from Momcozy can help mask the hum of the AC, while a separate humidifier can add necessary moisture back into the nursery.
If your baby has a tongue-tie (where the tissue under the tongue is too short), it might be physically difficult for them to keep their mouth closed. This is a common issue that many paediatricians in Singapore and Malaysia can check during routine Baby Bonus or SOCSO-covered check-ups.
Sometimes, after recovering from a cold, a baby might keep mouth breathing simply because they got used to it. It becomes a habit that needs gentle monitoring.
When your baby is in a deep, peaceful sleep on their back, their jaw muscles might simply relax, causing the mouth to fall open slightly.
SEA Mummy Tip: Keep an eye on your baby’s lips. In our weather, mouth breathing leads to rapid dehydration of the lips. If you see cracking, it is a sign they are losing too much moisture through their mouth at night.
Allowing a 2 month old baby to sleep with mouth open long-term can lead to several health and developmental hurdles.
Ready to help your little one? Follow these steps to clear the air.
If your newborn baby sleeps with mouth open due to a block, a nasal aspirator for newborns is your best friend. The Momcozy BreezyClear Pro™ offers adjustable suction to gently remove mucus without upsetting your baby.
2-in-1 Design
Hospital Grade Suction
Adjustable Suction
All-in-One Storage
2-in-1 Design
Hospital Grade Suction
4 Suction Levels
Mist Spray
Balance the AC by using a humidifier. Additionally, a newborn sound machine like the Smart Baby Sound Machine can create a soothing atmosphere, helping the baby stay in a deep, restorative sleep where nasal breathing is more likely.
$37.00 SGD
Portable & Compact
20 Sound Options
1200mAh Battery
Night Light
$53.00 SGD
$80.00 SGD
App Remote Control
Sleep-Wake Routine
7 Color LED Light
34 Sounds
Ensure your baby is on a firm mattress. During awake hours, using a baby high chair for upright support or a baby swing for relaxing can help develop the muscles needed for proper posture and breathing.
If you are using your CDA funds or private insurance for a check-up, keep a log of these symptoms to show your doctor:
Your paediatrician in Singapore or Malaysia will likely examine:
While it is something to monitor, it is often treatable. Catching it early prevents:
An occasional sigh or gasp is normal as their nervous system matures. However, frequent gasping in our humid climate could indicate an airway obstruction. Please consult a doctor if it happens often.
A reliable video baby monitor like the Momcozy BM04 allows you to zoom in on their face and check if their mouth is open without entering the room and risking a "false start" to their sleep.
Tongue-tie is very common and often diagnosed during the first few weeks of life. It can interfere with breastfeeding and breathing. Most SG hospitals can perform a simple "frenotomy" if necessary.
Both are helpful! An air purifier removes haze particles and allergens, while a humidifier prevents the AC from drying out their nose.
Spotting your baby sleeping with their mouth open is a call to action, but not a reason to panic. By managing the nursery environment and using helpful tools like nasal aspirators, you can ensure your little one breathes easy.
Trust your mummy instincts. If you feel their breathing isn't right, tap into your local healthcare resources for peace of mind.
The information provided in this article is for general informational purposes only and does not constitute medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider regarding any medical condition. Momcozy is not responsible for any consequences arising from the use of this content.
