The hidden impact of mouth breathing and open mouth posture on speech and feeding

ByLondon Speech and Feeding
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When most people think about speech or feeding difficulties, they picture the tongue, lips, or chewing skills, but how a child breathes at rest plays a surprisingly big role too.

Mouth breathing and open mouth resting posture can quietly influence everything from how a child’s face grows to how clearly they speak, to how confidently they chew and swallow. It’s something many parents never think about, until they start noticing the subtle signs.

Let’s explore why this happens, what to look for, and how to gently support better breathing and oral posture.

Recent research supports this link between mouth breathing and speech difficulties. For example, a 2022 study by Alhazmi et al., published in the Journal of Pharmacy and Bioallied Sciences, found that 81.7% of children aged 9–17 who breathed primarily through their mouths presented with speech sound disorders. The study highlights how mouth breathing can significantly influence orofacial development and articulation patterns.

💨 Why we’re designed to breathe through our nose

Our bodies are made for nasal breathing. When we breathe through the nose, the air is filtered, warmed, and humidified before reaching the lungs. The tongue naturally rests against the roof of the mouth, the lips close gently, and the jaw stays relaxed, all of which encourage healthy oral development.

In contrast, mouth breathing often means the tongue rests low in the mouth and the lips stay apart. Over time, this posture can subtly reshape how the muscles and bones of the face grow.

Children who breathe through their mouths most of the time may develop:

  • A longer face and narrower palate
  • Forward head posture
  • Slightly open lips and low tongue position at rest
  • A tendency toward drooling or noisy breathing
  • A dry mouth and consequently bad breath
  • At times the tongue pushes constantly against the front teeth causing them to grow forward (buck teeth)

These changes are not anyone’s fault, as they often start because of blocked noses, allergies, enlarged adenoids, low facial muscle tone or habits formed when a child was younger. But understanding the pattern helps us know how to support change.

🗣 How mouth breathing affects speech

Speech depends on precise coordination between the lips, tongue, and jaw. The resting position of these structures affects how ready they are to move.

  1. Reduced tongue strength and placement, i.e. the tongue rests low in the mouth (as it does in mouth breathing), it’s harder for children to lift it efficiently for sounds like /T/, /D/, /N/, /L/, and /S/. This can lead to speech that sounds slightly slushy or unclear, or a frontal lisp.
  2. Open mouth posture and resonance: An open mouth at rest may affect how air vibrates in the oral and nasal cavities. Children might have speech that sounds a bit ‘muffled’ or lacks crispness because the lips and jaw aren’t fully supporting articulation.
  3. Fatigue and breath control: Mouth breathing can lead to drier mouths and less efficient breath support. That can make longer sentences or conversations feel tiring, especially in noisy environments.

🥄 How mouth breathing affects feeding and chewing

Feeding involves the same structures that control speech, so posture and breathing patterns matter here, too.

  1. Chewing efficiency: Children who habitually keep their mouths open often have low tongue tone and reduced jaw stability. They may prefer softer foods, chew slowly, or struggle with mixed textures.
  2. Swallowing pattern: A tongue that rests low may push forward when swallowing. This ‘tongue-thrust swallow’ can interfere with efficient chewing and even affect dental alignment over time.
  3. Breathing while eating: Since it’s hard to chew, swallow, and breathe through the mouth simultaneously, children who can’t comfortably nasal breathe may rush bites or pause to catch their breath. This can contribute to coughing, choking, or food refusal.

Common signs to watch for

Parents often notice subtle clues before realising mouth breathing is a pattern. Some red flags include:

  • Lips habitually open at rest
  • Drooling after the toddler years
  • Snoring or noisy breathing during sleep
  • Preference for soft foods or grazing eating habits
  • Dark circles under the eyes due to allergies
  • Frequent colds, congestion, or mouth odour
  • Speech that sounds slushy or unclear despite good effort

If several of these sound familiar, it’s worth mentioning them to your child’s GP, dentist, or speech and language therapist.

👩‍⚕️ What can help

  1. Address the underlying cause: If nasal blockage, allergies, or enlarged adenoids are making nasal breathing difficult, a medical assessment is the first step. ENT specialists can rule out or treat physical causes.
  2. Encourage closed mouth rest: Gentle reminders like ‘Lips together, tongue up, breathe through your nose’ can help older children become aware of their resting posture. For younger ones, visual cues (stickers or mirrors) can make it a game.
  3. Build oral-motor strength and awareness: Speech therapists can design activities to strengthen the tongue and lips, improve jaw stability, and encourage balanced breathing. This might include blowing games, tongue-tip lifts, use of dental-palatal devices or oral-motor exercises disguised as play.
  4. Support good posture: Sometimes mouth breathing goes hand-in-hand with forward-head posture. Encouraging upright sitting during meals and screen time helps keep the airway open and supports better breathing habits.
  5. Make nasal breathing part of daily routines: Gentle nose-breathing practice during calm times (reading, bedtime, car rides) helps normalise it. Avoid making it a battle: calm, consistent reminders work best.

🌱 A gentle note on change

Patterns of mouth breathing develop over time, and change doesn’t happen overnight. It’s important to approach this with curiosity, not criticism. The aim isn’t ‘perfect breathing,’ but to give your child the tools and awareness to breathe comfortably and efficiently.

Small improvements in nasal breathing and resting posture can lead to big gains in speech clarity, eating confidence, and even sleep quality.

💡 The takeaway

Breathing seems automatic, and it is! but how we breathe matters. Mouth breathing and open-mouth posture can quietly shape how a child speaks, eats, and grows.

By noticing early signs, addressing underlying causes, and building supportive habits, you can help your child move toward stronger, clearer speech and more comfortable mealtimes.

Just like every area of development, progress starts with connection, patience, and gentle consistency, one calm breath at a time.

Sonja McGeachie

Highly Specialist Speech and Language Therapist

Owner of The London Speech and Feeding Practice.

References

Alhazmi, A., Alshamrani, A., Alhussain, A., et al. (2022). Mouth Breathing and Speech Disorders: A Multidisciplinary Study. Journal of Pharmacy and Bioallied Sciences 14(5):911. https://www.researchgate.net/publication/361978128_Mouth_breathing_and_speech_disorders_A_multidisciplinary_evaluation_based_on_the_etiology

Health Professions Council registered
Royal College of Speech & Language Therapists Member
Member of ASLTIP

Find a speech and language therapist for your child in London. Are you concerned about your child’s speech, feeding or communication skills and don’t know where to turn? Please contact me and we can discuss how I can help you or visit my services page.

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    Remember, feeding therapy is a collaborative process between parents, caregivers, and professionals. With patience, understanding, and the right strategies, you can help your child develop healthy eating habits and enjoy meals.

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    Forward chaining

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    Benefits of chaining

    • Increased motivation: By starting with the last step, my student experiences success, which boosts his motivation to continue trying to say the word and trying other words.
    • Reduced frustration: Breaking down the target behaviour into smaller steps can make the task less overwhelming, reducing frustration and anxiety.
    • Improved confidence: As the little learner masters each of the step, his confidence and self-esteem increases. Again, this leads to increased motivation.
    • Faster learning: By focusing on the final step first, and practising lots of chaining (forward and backward), a student can quickly learn to generalise to other words.

    Backward chaining (and forward chaining) is a really great tool for teaching complex speech sounds and words to children with phonological disorders.

    Watch out for my next blog which is all about the complexity approach in Phonology.

    Do get in touch if your child has a speech sound disorder, I would love to help.

    Any questions or need help with supporting your little one’s language please contact me via my contact form, or you could also check out www.hanen.org for advice and lots of inspiration.

    Sonja McGeachie

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    The London Speech and Feeding Practice

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    The quiet power: Why silence and responsiveness boost communication in children with delays

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    The quiet power: Why silence and responsiveness boost communication in children with delays
    Supplied by Sonja McGeachie, Practice Owner

    As parents and caregivers, our natural instinct when interacting with a child, especially one who struggles with communication, is often to fill every silence. We might ask lots of questions, offer constant commentary, or try to prompt him or her to speak. Our hearts are in the right place. We want to help him or her communicate! However, for children with language delays or those on the autism spectrum, this well-intentioned approach can sometimes inadvertently create more pressure and fewer opportunities for them to truly initiate and develop their own communication skills.

    What if I told you that one of the most powerful tools in your communication toolkit is often silence? And that responding to your child, rather than always initiating, can unlock incredible potential?

    Let’s explore why these seemingly simple strategies are so profoundly beneficial.

    The unspoken benefits of silence

    In our fast-paced world, silence can feel awkward, but for a child who is processing language differently, it’s a gift:

    1. Time to process: Children with language delays often need more time to process what they hear and to formulate their own thoughts or responses. When we bombard them with words, we don’t give their brains the crucial milliseconds they need to catch up. A pause of 5–10 seconds can make all the difference.
    2. Reduces pressure: Constant questioning or prompting can feel like a test. Silence removes this pressure, creating a more relaxed environment where the child feels safe to communicate without fear of being ‘wrong’ or rushed.
    3. Creates opportunity to initiate: If you’re always talking, when does your child get a turn to start the conversation? Silence opens up a space for him or her to initiate, whether it’s through a sound, a gesture, eye contact, or a word. This is vital for developing spontaneous communication.
    4. Encourages independent thinking: When a child is given space, he or she is more likely to try to figure things out himself or herself. This fosters problem-solving skills and reduces reliance on adult prompts.
    5. Prevents overwhelm (especially for ASD): Many children on the autism spectrum can be sensitive to auditory input. A constant stream of language can be overwhelming, leading to withdrawal or challenging behaviours. Strategic pauses can help them regulate and engage more effectively.

    The power of responding (not just initiating)

    Think of a tennis match: if only one person serves, it’s not a game. Communication is a rally, a back-and-forth exchange. When you primarily respond to your child’s communication attempts, you’re teaching him or her the rhythm of conversation:

    1. Follow the child’s lead: This is a cornerstone of effective language intervention, famously championed by programs like Hanen’s ‘It Takes Two to Talk’. When you respond to what your child is already interested in or doing, the interaction becomes immediately relevant and motivating for him or her.
    2. Validates his or her attempts: Every sound, gesture, glance, or partial word your child offers is a communication attempt. By responding to it, you’re telling him or her, ‘I see you. I hear you. Your communication matters.’ This builds immense confidence and encourages him or her to try again.
    3. Builds confidence and motivation: When a child feels understood and successful in his or her communication, he or she are more likely to communicate more often. It’s a positive feedback loop.
    4. Teaches turn-taking naturally: By taking your turn after his or hers, you model the natural flow of conversation. He or she learns that communication is a shared activity, not a one-sided lecture.
    5. Makes interactions meaningful: When you respond to his or her interests, you’re talking about things that are inherently motivating to him or her. This makes the language you use more easily understood and remembered.

    Practical strategies for parents: Observe, Wait, Listen (OWL)

    The Hanen Centre’s ‘Observe, Wait, Listen’ (OWL) strategy perfectly encapsulates these principles:

    • Observe: Watch your child closely. What is he or she looking at? What is he or she doing? What sounds is he or she making? What gestures is he or she using?
    • Wait: After you’ve observed, wait. Give him or her time. Resist the urge to jump in with a question or comment immediately. Count to five (or even ten) in your head. This silence is an invitation for him or her to communicate.
    • Listen: When he or she does communicate (in any way!), listen intently. Try to understand his or her message or intent.

    Beyond OWL – More tips:

    • Reduce questions, increase comments: Instead of ‘What’s that?’ try ‘Oh, a big red ball!’ or ‘The car is going fast!’ Comments provide language models without demanding a verbal response.
    • Expand, don’t just prompt: If your child says ‘Car’, you could respond with ‘Yes, That’s a big car!’ or ‘It’s really fast!’ You’re building on his or her communication with a slightly richer language model.
    • Create opportunities for communication: Place desired items slightly out of reach. This creates a natural reason for your child to communicate his or her wants (e.g., reaching, pointing, vocalising).
    • Respond to all communication: Don’t just wait for words. If your child points, look where he or she is pointing and comment. If he or she makes a sound, imitate it or respond with a related word.

    In summary

    Embracing silence and prioritising responsiveness might feel counterintuitive at first, especially when you’re eager for your child to talk. However, these powerful strategies create a nurturing, low-pressure environment that encourages spontaneous communication, builds confidence, and truly meets your child where he or she is. By giving your child the space and the meaningful responses he or she needs, you’re laying a strong foundation for his or her communication journey.

    Try incorporating these ‘quiet powers’ into your daily interactions and watch your child’s communication blossom.

    Sonja McGeachie

    Highly Specialist Speech and Language Therapist

    Owner of The London Speech and Feeding Practice.

    Health Professions Council registered
    Royal College of Speech & Language Therapists Member
    Member of ASLTIP

    Find a speech and language therapist for your child in London. Are you concerned about your child’s speech, feeding or communication skills and don’t know where to turn? Please contact me and we can discuss how I can help you or visit my services page.

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  • Empty Set and Phonology approaches

    ByLondon Speech and Feeding

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    With this approach, we use two sounds that our student is struggling with. For example, in my video this student cannot produce /sh/ and /r/. Both sounds have different rules, so I decided to contrast them with each other.

    • The rules of /sh/ are: no voice, air is pushed out through teeth, produced at the front.
    • The rules for /r/ are: use your voice, produce the sound in the middle of the mouth by shaping your tongue in a particular way.

    So I chose the words ‘shoes’ and ‘ruse’ as their rules are quite different. Contrasting two sounds the student does not know has been shown to lead to greater change in the child’s articulation. And I can certainly vouch for this as my student is making the best progress with this approach.

    Phonology Therapy – what is it, why and how?

    Phonology is the study of the sound system of a language. It’s distinct from articulation therapy which focuses on the physical production of sounds.

    Phonology therapy focuses on rules. For example, sounds that are produced at the front of the mouth, in contrast to sounds that are produced at the back of the mouth, or sounds that are produced with a long air stream: /s/ or /f/ versus short sounds like /p/ or /t/; sounds are produced with voice or without voice.

    Many children, and sometimes adults, are unaware of some of the speech rules and confuse and replace individual sounds. They might say TAT instead of CAT or SIP instead of SHIP.

    A quick overview of phonology approaches I use:

    Minimal Pairs:

    This approach is good for single sound substitutions. We offer word pairs that differ by only one sound, like ‘ship’ and ‘sip.’ One of our first goal in therapy is to highlight the difference between the target sound (e.g., /sh/) and the sound the child uses (e.g., /s/). This helps discriminate and eventually produce the correct sound.

    Multiple Oppositions:

    A child might replace lots of sounds with a single sound like a /d/. So instead of ‘four’, ‘chore’ and ‘store’ our child says ‘door’, making speech very unintelligible.

    The approach is typically geared towards shaking up the phonological system. Our goal is to choose two to four targets that are different from each other, and different from the substituted sound. If our child’s favourite sound is /d/ they can use their voice and make a short sound by stopping their airflow. So I will choose a different target sound to change up the speech system. For example I might choose an /f/, a /m/ and a /k/ sound. So I would contrast: ‘door’ with ‘four’, ‘more’ and ‘core’.

    Maximal Oppositions:

    In the Maximal Oppositions approach the treatment sets consists of words that are minimally contrasted and that have maximal or near maximal feature differences between each word pair. One word in a pair represents a sound the child ‘knows’ (can say at word level) and the other represents a sound the child does not know (cannot say).

    For example, a child may ‘know’ /m/ and be able to say words like ‘man’, ‘mat’ and ‘mine’. However, the same child may be unable to say /f/ as in ‘fan’, ‘fat’ and ‘fine’. The consonants /f/ and /m/ are maximally opposed as follows.

    I am always delighted to work on speech sound disorders, I love the challenge and the successes we can celebrate together. Get in touch with me!

    Sonja McGeachie

    Early Intervention Speech and Language Therapist

    Feeding and Dysphagia (Swallowing) Specialist The London Speech and Feeding Practice

    The London Speech and Feeding Practice

    Find a speech and language therapist for your child in London. Are you concerned about your child’s speech, feeding or communication skills and don’t know where to turn? Please contact me and we can discuss how I can help you or visit my services page.

    1
  • · ·

    How can we support babbling and early speech development? SLT tricks and tips

    ByLondon Speech and Feeding

    My baby isn’t babbling and developing speech – what can I do to support?

    While every baby develops at their own pace, if your child isn’t babbling by nine months, it’s worth seeking help from an Early Intervention Health Professional, such as a doctor and a speech therapist. Don’t panic! There are many reasons for delayed babbling, and early intervention is key.

    In the meantime, it is highly recommended that we talk, sing, and read to our baby often. Exaggerate sounds and expressions, and respond to their coos and smiles. This playful interaction helps stimulate their communication skills.

    Below are some tips and tricks from my experience of working with babies and toddlers who need a little bit of help and support to develop.

    The benefits of imitating your baby

    Copying your baby’s sounds and gestures isn’t just silly fun, it’s a powerful learning tool! By mimicking their babbles and actions, you activate “mirror neurons” in their brain that help them connect sounds with meaning. This playful back-and-forth teaches turn-taking, a foundation for conversation. Plus, it encourages them to copy you, building their own language skills and social interaction abilities.

    Image by freepik

    This is a nice clip on youtube showing how copying/imitating your baby looks like:

    Here are some fun ways to imitate your baby:

    • Matchmaker: Grab two of the same, or two similar toys your child loves, like rainmakers or shakers. Give one to your baby and keep the other for yourself. When your child plays with his/her toy, mirror his/her actions with yours! This creates a fun, interactive game.
    • Face Time: Get down to your baby’s level, sitting opposite him/her on the floor or kneeling. This makes eye contact easy and encourages him/her to look at you during your playful imitation.
    • Be the Funniest You: Go all out with silly faces, exaggerated sounds, and big gestures. The goal is to capture your baby’s attention and make you irresistible to watch. This playful energy encourages him/her to interact and potentially imitate you back!

    By incorporating these tips, you can turn imitation into a fun and engaging way to boost your baby’s communication skills. I have seen this happen numerous times over the past decades. It is very powerful, go ahead and try it! You cannot be silly and goofy enough!

    Great toy ideas:

    Steel Tongue Drum
    Baby Rainbow Rattle toys
    Organza Veil Fabric good for hide and seek
    Light up magic ball toy wand
    The Glowhouse flashing swivel fan
    Mini portable hand held body massager
    Hape Beaded Raindrops
    Bubbles – always handy keep in every room
    Montessori Mirror
    Antic Duck Peekaboo Knob Puzzle Suction Cup Spinner toys

    Did you know that speech and language development starts with how we talk to our babies?

    Adults naturally use a special way of speaking called motherese. It involves a higher pitch, slower pace, and exaggerated sounds compared to regular conversation. Sentences are simpler, with shorter words and repetition. This grabs babies’ attention, helps them distinguish sounds, and reinforces word meaning.

    Imitation is a key part of motherese. We wait for our baby to make a sound or gesture, then playfully imitate it with exaggeration. Babies notice this right away and often respond with more vocalisations, creating a mini conversation. This back-and-forth teaches turn-taking, a foundation for future conversations.

    By responding warmly and engaging in these playful interactions, we encourage our babies to keep exploring the world of communication. Talking, singing, reading and, of course, imitating, these simple actions can have a big impact on a baby’s language development.

    Once your conversation is underway then try and keep it going for as long as possible. It’s a beautiful dance of turn-taking, even without words!

    A last word on oxytocin

    There’s evidence suggesting early non-verbal communication with your baby can increase a mother’s oxytocin levels, often called the ‘love hormone’. This hormone plays a key role in bonding and social connection. Positive interactions, touch, and stress reduction all contribute to oxytocin release, strengthening the mother–baby bond.

    For parents of babies with extra needs

    The stress of caring for a child with medical needs or developmental delays can be difficult. Stress can lower oxytocin levels, creating a cycle of sadness for both parent and child.

    Breaking the cycle:

    1. Knowledge is Power: Understanding the importance of communication can empower parents.
    2. Seek Support: Speech therapists and other healthcare professionals can provide valuable guidance on communication strategies.
    3. Start Small, Celebrate Big: Even small interactions can boost oxytocin. Focus on playful imitation and positive reinforcement. Remember, friends, family and healthcare professionals are there to encourage you.

    This approach can help reverse the negative cycle and create a more positive and connected relationship between parent and child.

    I hope this is helpful! Don’t hesitate to reach out with any questions.

    Kind regards

    Sonja McGeachie

    Early Intervention Speech and Language Therapist

    Feeding and Dysphagia (Swallowing) Specialist The London Speech and Feeding Practice

    The London Speech and Feeding Practice

    Find a speech and language therapist for your child in London. Are you concerned about your child’s speech, feeding or communication skills and don’t know where to turn? Please contact me and we can discuss how I can help you or visit my services page.

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