
It is common for newborns to sleep with their mouths open, and while it might look cute, it could be a sign of a medical issue. Newborns tend to breathe through their noses almost exclusively unless their nasal passage is blocked. Mouth breathing in newborns could be a sign of upper respiratory problems, which may lead to other medical complications when left untreated. It could also be a sign of sleep apnea, which can be caused by enlarged adenoids or tonsils. If you notice your newborn sleeping with their mouth open, it is recommended to monitor when it is happening and how often, and to consult a doctor if you are concerned.
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What You'll Learn
- Newborns tend to sleep a lot, and mouth breathing may develop as a habit
- Blocked nasal passages can cause newborns to breathe through their mouths
- Mouth breathing may be a sign of sleep apnea
- It can lead to health issues like hypertension and heart problems
- Mouth breathing may be caused by a deviated septum

Newborns tend to sleep a lot, and mouth breathing may develop as a habit
Newborns tend to sleep a lot, with some sleeping for up to 16 to 18 hours a day. During sleep, newborns may breathe through their mouths if their nasal passages are obstructed. This could be due to a stuffy nose from a cold, allergies, or a more complex condition. In some cases, mouth breathing may be a sign of sleep apnea, a condition where breathing suddenly stops during sleep. This is often caused by enlarged adenoids or tonsils, which block the upper airway. Other signs of sleep apnea include snoring, coughing, choking, and restlessness during sleep.
If your newborn is mouth breathing, it is important to determine the cause and address any underlying issues. While it may be cute to see your baby sleeping with an open mouth, it could indicate a health condition that needs attention. Mouth breathing can lead to long-term health consequences if left untreated. It can affect the development of the brain and cause dental issues, facial abnormalities, and behavioural problems.
In some cases, mouth breathing may develop into a habit, even when the newborn is awake. This can happen if the baby has recently recovered from an illness that caused nasal congestion. To break this habit, you can try some easy at-home treatments to help your baby breathe better. However, if the problem persists or is accompanied by other symptoms, it is recommended to consult a pediatrician or a dental professional.
It is important to monitor your baby's breathing and overall health to ensure they are getting the best care possible. While it may be common for newborns to breathe through their mouths due to nasal congestion, it is always best to seek professional advice if you have any concerns.
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Blocked nasal passages can cause newborns to breathe through their mouths
It is not uncommon for newborns to sleep with their mouths open, and while it may look cute, it could be a sign of a medical issue. Newborns tend to sleep a lot, and blocked nasal passages can cause them to breathe through their mouths.
Newborns breathe almost exclusively through their noses. Young babies have not yet developed the reflex to breathe through their mouths until around the age of three to four months. Blocked nasal passages can be caused by something harmless, like a stuffy nose from a cold or allergies, or it could be due to more complex conditions. In some cases, an abnormality in the bone and cartilage that separate the nostrils can make it difficult for newborns to breathe through their noses efficiently. This is more common in people with a narrower upper jaw.
Mouth breathing in newborns can lead to long-term health consequences if left untreated. It can affect the development of their brains and cause dental issues, facial abnormalities, and other types of impacts. It can also cause behavioural problems in children, contributing to their inability to focus, irritability, and lack of sleep. Mouth breathing does not increase the amount of oxygen going into the body, which can cause health problems such as heart problems, hypertension, or high blood pressure over time.
If your newborn is sleeping with their mouth open, it is important to monitor when it is happening and how often to help determine the cause. In some cases, it may be nothing to worry about, but if you are concerned, it is recommended to consult a doctor or a pediatric dentist, especially if your baby is showing other symptoms such as restlessness during sleep, snoring, choking, coughing, or pauses in breathing.
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Mouth breathing may be a sign of sleep apnea
While it is common for newborns to sleep with their mouths open, it may be a cause for concern. Newborns tend to breathe almost exclusively through their noses, except when their nasal passages are obstructed. Mouth breathing in newborns can be a sign of upper respiratory problems, which may lead to other medical complications if left untreated.
Mouth breathing can narrow the upper airway and reduce the length of the upper airway dilator muscles, worsening the severity of sleep apnea. It can also lead to lower oxygen intake, further aggravating the oxygen desaturation associated with sleep apnea. Mouth breathing can also cause increased snoring, as the unimpeded airflow causes vibrations in the throat tissues. This can disrupt the sleep of both the child and their parents or caregivers.
If you notice your baby sleeping with their mouth open and are concerned, it is recommended that you schedule an appointment with your pediatrician. They can advise you on any necessary testing, such as an overnight sleep study, or recommend treatment options such as medication, positive airway pressure therapy, or surgery in more severe cases.
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It can lead to health issues like hypertension and heart problems
While it may be harmless and even cute to see a newborn sleeping with their mouth open, it can sometimes be a cause for concern. Mouth breathing in newborns can lead to several health issues, including hypertension and heart problems.
Mouth breathing in newborns is often due to a blockage in the upper airway, such as the nose or throat. This could be caused by a stuffy nose, allergies, enlarged adenoids or tonsils, or more complex conditions. When a newborn consistently breathes through their mouth, it can lead to reduced oxygen absorption in the lungs, impacting their overall health.
Over time, chronic mouth breathing can lead to a condition known as Long Face Syndrome, where the lower facial features elongate disproportionately. This condition can only be corrected through surgery. Additionally, mouth breathing can cause dental health issues, such as crooked teeth, gummy smiles, and an increased risk of tooth decay due to decreased saliva production.
The social stigma associated with mouth breathing can also impact a child's emotional well-being. Children who breathe through their mouths may be perceived as less intelligent or socially inept, leading to potential social exclusion and low self-esteem.
Furthermore, mouth breathing can interfere with proper sleep, leading to irritability and restlessness. This disrupted sleep pattern can contribute to hypertension and put additional strain on the heart, potentially leading to heart problems in the long run.
It is important for parents to monitor their newborn's breathing patterns and consult a pediatrician or dental professional if they notice persistent mouth breathing. Early intervention can help address any underlying issues and prevent potential health complications, including hypertension and heart problems.
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Mouth breathing may be caused by a deviated septum
Newborns tend to sleep a lot, and some babies sleep for 16 to 18 hours a day. Mouth breathing in newborns can be a sign of a blockage in the upper airway, such as the nose or throat. This could be caused by a deviated septum, which is when the nasal septum, a partition made of bone and cartilage that divides the nose into two airway passages, is off-centre, blocking one or both sides of the nose and making breathing difficult. This can lead to an increased need to breathe through the mouth.
A deviated septum can cause several symptoms, including difficulty breathing, nasal congestion, nose bleeds, headaches, and sleep apnea. If left untreated, mouth breathing can lead to long-term issues such as reduced oxygen concentration in the blood, which can cause high blood pressure and heart problems. It can also cause dental issues, facial abnormalities, and impact brain development.
If you suspect your baby is mouth breathing due to a deviated septum or other medical issues, it is important to consult a doctor or pediatrician. They can advise you on any necessary testing, such as an overnight sleep study, and recommend treatment options. In some cases, surgery may be recommended to correct the deviated septum or address other issues causing breathing problems.
While it may be tempting to try home remedies first, it is always best to seek professional advice to ensure your baby's health and rule out any serious underlying conditions.
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Frequently asked questions
Newborns tend to sleep a lot, and it is common for them to sleep with their mouths open. However, it could be a sign of a medical issue.
A newborn might sleep with their mouth open due to a blocked nasal passage, which could be caused by a cold, allergies, or a deviated septum. In some cases, it could be due to problems with their bite and mouth structure, or it may simply be a habit they have picked up.
Mouth breathing may lead to dental health issues, sleep disorders, and allergies. It can also cause behavioural problems, contributing to irritability, lack of focus, and lack of sleep. In some cases, it can lead to more serious health issues such as heart problems or high blood pressure.
If your newborn is sleeping with their mouth open, you should monitor them and keep track of any other symptoms. There are some home remedies that can help your baby breathe better, but if the problem persists or they are showing signs of breathing difficulties, you should consult your paediatrician or a dental professional.
Newborns may sleep with their mouths open due to a blocked nasal passage, so ensuring their nasal passages are clear may help. However, if the issue is related to their jaw or mouth structure, you may need to seek professional advice for further guidance.

















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