Dr. Zainab Ariswala - Mouth Breathing in Babies & Children: Causes, Symptoms & Treatment
By Dr. Zainab Arsiwala, Fellowship-Trained Pediatric ENT Surgeon, DHA Licensed, Dubai | Medically Reviewed: June 2026
Have you noticed your child sleeping with their mouth open every night and wondered whether it is simply a habit or a sign of something more serious?
Numerous parents believe that mouth breathing is not a harmful condition. Mouth breathing may occur in healthy children on an occasional basis, but if it persists, it could mean an underlying issue with the nose, throat, airway, sleep, facial growth, dental development, and general health.
Knowing when to seek medical help and why children may become a mouth breather can help prevent long term problems. This guide will cover the most frequent causes of mouth breathing, signs to look out for, treatment options and when to seek help from a pediatric ENT specialist.
What is Mouth Breathing?
Mouth breathing occurs when a child regularly breathes through the mouth instead of the nose.
The nose performs important functions to filter, warm, and humidify the air before it reaches the lungs. When airflow through the nose becomes restricted, children may begin breathing through their mouth to compensate.
Although temporary mouth breathing during a cold can occur, ongoing mouth breathing should not be ignored.
Why is nasal breathing important?
Healthy nasal breathing offers several important benefits:
Function | Why It Matters |
Air filtration | Helps remove dust, allergens, and irritants |
Humidification | Prevents dryness of the throat and airways |
Temperature regulation | Warms or cools air before it reaches the lungs |
Better sleep quality | Supports normal breathing during sleep |
Facial development | Encourages healthy jaw and facial growth |
Oral health | Helps reduce dry mouth and dental problems |
When nasal breathing is consistently blocked, children may rely on mouth breathing both during the day and at night.
Common causes of Mouth Breathing in Children
A child usually breathes through the mouth when something is making it harder to breathe freely through the nose. The reason may be temporary, such as a cold, or it may be related to an ongoing condition that needs medical attention.
Adenoids are small pads of tissue located at the back of the nose. When they become enlarged, they can partially block the nasal airway and make it difficult for a child to breathe through the nose.
Children with enlarged adenoids may have:
- Regular mouth breathing
- Snoring during sleep
- Restless or disturbed sleep
- A nasal-sounding voice
- Recurrent ear infections
Enlarged adenoids are one of the most frequent reasons children develop ongoing mouth breathing.
2. Enlarged Tonsils
When the tonsils become larger than usual, they can reduce the space available for airflow, especially while a child is asleep.
Common signs include:
- Loud snoring
- Brief pauses in breathing during sleep
- Trouble swallowing certain foods
- Sleeping with the mouth open
3. Allergic Rhinitis
Children with allergies often struggle with a blocked or stuffy nose for long periods. When nasal breathing becomes difficult, they may naturally start breathing through their mouth instead.
Symptoms may include:
- Persistent nasal blockage
- Frequent sneezing
- An itchy nose
- A runny nose
- Mouth breathing caused by congestion
4. Frequent Colds and Sinus Infections
Young children commonly experience colds throughout the year. If nasal congestion occurs repeatedly or lasts for extended periods, they may begin relying on mouth breathing to get enough air.
Repeated colds, lingering congestion, and recurring sinus infections can all contribute to a child spending more time breathing through the mouth rather than the nose.
5. Deviated Nasal Septum
The nasal septum divides the two sides of the nose. If it is significantly crooked, airflow may become restricted.
Children with a deviated septum may have:
- Chronic nasal blockage
- Difficulty breathing through one side of the nose
- Sleep disturbances
6. Habitual Mouth Breathing
Sometimes a child continues mouth breathing even after the original cause has been resolved. Over time, the pattern can become habitual and may require intervention.
Signs and Symptoms of Mouth Breathing in Children
Persistent mouth breathing can affect more than just breathing.
Parents may notice:
Daytime Symptoms
- Breathing through the mouth while awake
- Dry lips
- Dry mouth
- Bad breath
- Difficulty concentrating
- Irritability
- Fatigue
- Speech changes
Nighttime Symptoms
- Sleeping with the mouth open
- Snoring
- Restless sleep
- Frequent awakenings
- Teeth grinding
- Excessive sweating during sleep
Physical changes that may develop over time
Long-standing mouth breathing may influence facial and dental development.
Potential changes include:
Possible Changes | Description |
Long face appearance | Increased facial length |
Narrow upper jaw | Reduced space for teeth |
Open bite | Front teeth do not meet properly |
Crowded teeth | Misalignment of teeth |
High-arched palate | Narrow roof of the mouth |
Early treatment can help reduce the risk of these complications.
When should parents be concerned?
A child who breathes through their mouth during a cold or a blocked nose for a few days usually does not need to be concerned. The situation is different when mouth breathing becomes a regular pattern or is accompanied by other symptoms.
It is worth arranging an evaluation if your child has:
- Regular mouth breathing during the day or night
- Ongoing snoring
- Breathing pauses while asleep
- Restless or disturbed sleep
- Frequent daytime fatigue
- Changes in mood
- Trouble staying focused at school
- Difficulty in swallowing food and liquids
- Ongoing stuffy nose or blocked nasal passages
- Speech that sounds unclear or different than usual
- Frequent ear infections that keep coming back
A timely evaluation helps in uncovering the reason behind the problem and support better breathing, more restful sleep, and improved day-to-day health.
Can Mouth Breathing affect sleep?
Yes. Many children who breathe through their mouths also experience disrupted sleep.
Poor-quality sleep can affect:
- Attention span
- Learning
- Memory
- Mood
- Growth
- Academic performance
In some cases, mouth breathing may be associated with pediatric sleep-disordered breathing or obstructive sleep apnea.
Children who snore regularly or appear to struggle for breath during sleep should be evaluated by a pediatric ENT specialist.
How is Mouth Breathing diagnosed?
A thorough evaluation identifies the underlying cause.
During the assessment, the ENT specialist may review:
- Sleep habits
- Breathing patterns
- Allergy history
- Previous infections
- Feeding and swallowing concerns
- Growth and developmental history
A physical examination typically includes evaluation of the:
- Nose
- Tonsils
- Adenoids
- Oral cavity
- Throat
- Airway
In some cases, additional investigations may be recommended.
Possible diagnostic tests
Test | Purpose |
Nasal endoscopy | Examines nasal passages and adenoids |
Sleep study | Evaluates sleep-related breathing problems |
Allergy assessment | Identifies allergy triggers |
Imaging studies | Evaluates structural abnormalities |
Treatment Options for Mouth Breathing in Children
Treatment depends on the underlying cause.
Allergy Management
When allergies contribute to nasal blockage, treatment may include:
- Allergen avoidance
- Saline nasal rinses
- Prescription nasal sprays
- Allergy medications
Treatment of Nasal Congestion
Managing chronic congestion can help restore normal nasal breathing.
This may involve:
- Treating infections
- Managing sinus problems
- Addressing environmental triggers
Adenoid Removal (Adenoidectomy)
If enlarged adenoids significantly block the airway, surgical removal may be recommended.
Many children experience improved breathing and sleep after treatment.
Tonsil Surgery (Tonsillectomy)
Children with enlarged tonsils and sleep-disordered breathing may sometimes benefit from tonsil removal.
Habit-Reversal Therapy
For children who continue mouth breathing after the blockage has resolved, breathing retraining and oral muscle exercises may help establish healthy breathing patterns.
Why does early treatment matter?
Early intervention can help:
- Better quality sleep and more restful nights
- Improved attention and focus during daily activities
- Support normal facial and jaw development
- Lower the risk of dental and bite-related problems
- Help children develop clearer speech and communication skills
- Contribute to overall health and day-to-day well-being
When concerns are identified and managed early, children often have a better chance of avoiding complications that may become harder to address later.
Why do families trust Dr. Zainab Arsiwala for Pediatric ENT Care?
Dr. Zainab Arsiwala is a fellowship-trained pediatric ENT surgeon who cares for children with a wide range of ear, nose, throat, sleep, and airway concerns, from common childhood conditions to more complex ENT problems.
Her practice focuses exclusively on pediatric ENT care, allowing for a detailed understanding of the unique anatomical and developmental needs of infants, children, and adolescents.
Families value her approach because it combines:
- Advanced fellowship training in children’s ear, nose, and throat conditions
- Extensive experience managing breathing, airway, and sleep-related concerns in children
- Thorough assessments designed specifically for infants, children, and adolescents
- Treatment recommendations based on current pediatric ENT practices and each child’s individual needs
- Open, honest discussions that help parents understand every step of the process
- Personalized treatment plans are developed around the child’s symptoms, age, and overall health
Whether a child has recurring ENT problems or more complex breathing concerns, Dr. Zainab takes the time to understand the full picture before recommending treatment. Families appreciate the careful approach, detailed evaluations, and attention given to every child during their care journey.
Helping your child breathe more comfortably
Children commonly breathe through their mouths during a cold, allergy flare-up, or a blocked nose. In most cases, this settles once the congestion improves. When mouth breathing continues day after day, though, it may be a sign that something is preventing normal nasal breathing.
Left unaddressed, it can affect sleep, attention, daytime alertness, dental alignment, and even the way the face develops over time. Understanding what is causing the problem is an important first step toward helping your child breathe more comfortably.
Many children who breathe through their mouths improve once the underlying reason is found and treated. Looking into the problem early can help prevent it from affecting sleep, daily activities, growth, and overall comfort.
If your child snores most nights, sleeps with their mouth open, struggles with a blocked nose, or often seems tired and irritable during the day, an evaluation by a pediatric ENT specialist may be helpful. Identifying the cause early can lead to more effective treatment and better long-term outcomes.
Concerned about mouth breathing in children, chronic snoring, enlarged adenoids, or other pediatric ENT concerns?
Meet Dr. Zainab Arsiwala for a comprehensive pediatric ENT assessment and personalized treatment plan designed around your child’s needs.
FAQs
Can mouth breathing be normal in babies?
Babies may occasionally breathe through their mouth when they have a blocked or stuffy nose. If it continues even after the congestion has cleared, it is worth having it checked by a pediatric ENT specialist.
Why does my child sleep with their mouth open?
Children often sleep with their mouth open when something is making it difficult to breathe comfortably through their nose. Enlarged adenoids, enlarged tonsils, allergies, and ongoing nasal blockage are common reasons.
Is mouth breathing harmful?
Occasional mouth breathing is usually not a concern. However, if it happens regularly over a long period, it may interfere with sleep, affect dental development, and influence how the face and jaws grow as a child develops.
Can allergies cause mouth breathing?
Yes. Chronic nasal blockage caused by allergies is one of the most common reasons children become a mouth breather.
Do enlarged adenoids always require surgery?
No. Treatment is based on symptom severity, age, and the degree of airway obstruction.
Can mouth breathing affect school performance?
Poor sleep associated with mouth breathing can sometimes contribute to difficulty concentrating, irritability, and daytime fatigue.
At what age should mouth breathing be evaluated?
Persistent mouth breathing at any age deserves medical attention, especially when accompanied by snoring, sleep issues, or nasal blockage.
Can mouth breathing be reversed?
In many cases, it can be reversed. Once the cause is identified and treated, normal nasal breathing often improves significantly.
Can mouth breathing cause bad breath in children?
Breathing through the mouth dries out the mouth, which may contribute to bad breath.
Will my child outgrow mouth breathing?
Not always. If mouth breathing continues for several months or is linked to an underlying condition, an evaluation is recommended.
About the author
Dr. Zainab Arsiwala
Dr. Zainab Arsiwala is a fellowship-trained Pediatric ENT Surgeon in Dubai, holding dual DHA licenses in both ENT and Specialist Pediatric ENT, one of the few doctors in the region with this distinction.
She trained at Al Jalila Children’s Hospital, Dubai, with advanced airway observerships at CHUV (Switzerland) and Cincinnati Children’s Hospital (USA). She holds a Fellowship from the European Board of Otorhinolaryngology Head and Neck Surgery (ORL-HNS) and a DNB in ENT.
Currently practising at Tarabichi ENT Institute and JTS Medical Centre, Dubai, she provides evidence-based, child-focused ENT care for conditions ranging from ear infections and hearing loss to complex airway and syndromic cases.
Medical Disclaimer
This article is for informational purposes only. For personalised advice, diagnosis, or treatment tailored to your condition, book a consultation with Dr. Zainab Arsiwala.
