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When Do Babies Start Breathing Through Their Mouth

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When Do Babies Start Breathing Through Their Mouth? Babies generally start breathing through their mouth instead of their nose around the age of 4 to 6 months. This is because they are developing nasal congestion due to having a smaller nasal passage and more mucus production than adults. The increased mucus production can make it difficult for them to breathe through their noses.

They also don’t have enough strength yet in their tongue muscles to keep food or liquid out of the airway when feeding, so they learn how to suck-breath which involves both sucking on a bottle and taking short breaths through the mouth at the same time. As babies get older, they begin to transition from mouth-breathing back to nasal breathing as their bodies become stronger and more developed.

Babies begin to breathe through their mouths at around 5-6 weeks when their nasal passages fill with mucus. This usually happens after the baby has been crying and saliva has gathered in the mouth and throat area. As a result, it becomes easier for them to take in air through the mouth rather than through the nose.

During this time, parents should pay close attention to ensure that babies are able to get enough oxygen even if they are breathing through their mouths and not just their noses.

When Can Babies Breathe Through Their Mouth Nhs

Babies typically begin to breathe through their mouth after around three months of age, as this is when the nose and throat muscles become developed enough for them to do so. According to the NHS, babies should not be encouraged to breathe through their mouths until they are at least 6-12 months old in order to ensure proper development of their respiratory system.

When Do Babies Start Breathing Through Their Mouth


Can Babies Breathe Through Their Mouth When Congested?

Yes, babies can breathe through their mouths when they are congested. This is because the nose and mouth are connected by an airway known as the nasopharynx. When a baby is congested from a cold or other illness, it becomes harder for them to draw in air through their noses due to nasal passageways becoming blocked with mucus.

As a result, infants will often resort to using their mouths as an alternative source of oxygen until the congestion passes. It’s important that parents monitor their infant’s breathing patterns if they become congested and seek medical help if necessary should there be any signs of difficulty breathing or labored breathing such as wheezing or noisy breaths. In addition, steam inhalation may also help reduce congestion which can make it easier for babies to breathe normally again.

Is It Ok to Let Baby Sleep With a Stuffy Nose?

When it comes to letting your baby sleep with a stuffy nose, there are a few important considerations to take into account. On the one hand, having stuffed-up nasal passages can make sleeping more difficult and uncomfortable for babies. This can result in them waking up more often during the night, leading to less restful sleep overall.

On the other hand, some experts suggest that leaving mucus in the nasal passages could help prevent further infection and allow their bodies to naturally heal themselves. Ultimately, whether or not you decide to let your baby sleep with a stuffy nose will depend on several factors such as how severe the congestion is, how long it has been going on for and any underlying medical conditions they may have. If you do choose this option then ensure that their bedroom is kept at an optimal temperature (neither too hot nor cold) as this can also exacerbate nasal congestion issues.

Additionally, use a humidifier next to their bed so that moisture helps loosen secretions which might be causing a blockage in their airways; alternatively, you could even try saline drops or spray prior to putting them down for naps and nighttime periods of sleep if needed. Ultimately though, if your little one’s symptoms persist or get worse over time then seeking medical advice from your pediatrician would be advisable before taking any further action.

How Long Are Babies Obligate Nose Breathers?

Babies are obligate nose breathers for the first few months of their lives. This means that they rely on breathing through their noses to draw in oxygen and expel carbon dioxide, as opposed to using their mouths. During this period, babies must breathe exclusively through their noses due to the structure of their airways; until around 4-6 months old, the connection between the nasal cavity and trachea (windpipe) is too small for them to effectively breathe through both at once.

As a result, any stuffiness or congestion can lead to difficulty breathing and should be treated promptly by a doctor or healthcare provider. Fortunately, most babies outgrow this stage quickly without major complications – typically within 2-3 months after birth – allowing them to begin using both mouth and nose simultaneously when inhaling and exhaling.

When Should I Be Concerned About My Baby’S Mouth Breathing?

As a parent, it is natural to be concerned about the wellbeing of your baby. One area that you should pay attention to is their breathing and any potential signs of trouble. Mouth breathing in infants can be a sign of an underlying issue, so if your little one has been mouth breathing for more than a few days or weeks, then you should contact your doctor as soon as possible.

Your paediatrician will know how best to evaluate the situation and recommend treatment if necessary. In some cases, allergies or seasonal illnesses may lead to temporary mouth breathing in babies but prolonged periods could indicate something more serious like sleep apnea or other respiratory conditions. If you notice that your baby’s nostrils are flaring when they breathe and their lips are pursed together while sleeping or during activity, it’s important to take them for evaluation right away in order to avoid any long-term consequences from untreated illness.

What Causes Mouth Breathing in Children?


In conclusion, it is important to note that babies typically start breathing through their mouth from around 6 months old. However, there are exceptions and some may begin earlier or later than this. It is essential to understand the signs of normal development in order to identify any issues early on.

If you have any concerns about your baby’s breathing patterns, it is best to consult a medical professional for advice.

Jennifer C. Wilson

Jennifer C. Wilson is a respected author and baby expert behind the informative blog, With years of experience in early childhood development and as a mother of two, Jennifer provides valuable tips and resources for parents looking to provide the best care for their little ones.

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