Oro-myofunctional disorders occur when the muscles of the face, mouth and tongue do not work together in the expected way. These patterns can affect speech clarity, breathing, swallowing, facial development and oral habits. Children may present with tongue thrust, open-mouth posture, or difficulty producing certain speech sounds, often without realising these patterns exist.
What Are Oro-myofunctional Disorders?
Oro-myofunctional disorders (OMDs) involve atypical tongue, lip or jaw movements that interfere with normal oral function. These patterns are often habitual and may develop long before a child begins speaking.
Common OMDs include:
Signs & Indicators
Your child may benefit from assessment if they:
Causes
Causes and contributing factors may include:
FAQ: Oro-Myofunctional Disorders (OMDs)
What does an Oro-myofunctional Disorder look like in children?
Children with OMDs may show signs such as persistent open-mouth breathing, noisy chewing, food remaining in the mouth after swallowing, or drooling beyond the typical age. Some children push their tongue forward when they swallow, have difficulty keeping their lips closed or find it challenging to coordinate movements needed for clear speech. Parents often notice that their child seems “tired” when eating, avoids certain textures or seems to work harder than expected during meals. Others may present with dental crowding, narrow palate development or orthodontic issues linked to tongue posture. These signs are often subtle on their own, but together they point toward an underlying myofunctional pattern.
What causes Oro-myofunctional Disorders?
OMDs can develop for several reasons. Some children have airway restrictions, such as enlarged tonsils, adenoids or nasal congestion, which cause them to breathe through their mouth rather than their nose. Others may have low tongue tone, restricted tongue movement (including tongue-tie), chronic allergies, early feeding difficulties or prolonged dummy/thumb sucking habits. Because the mouth, airway and facial muscles work closely together, a disruption in one area can affect overall function.
How do OMDs affect feeding and chewing?
Children with OMDs may tire quickly while eating, take a long time to finish meals or avoid foods that require sustained chewing. Some prefer softer textures because chewing feels effortful or uncoordinated. Others may swallow with their tongue pushing forward, making eating messy or inefficient. These challenges are not behavioural, they reflect the muscle patterns and coordination of the oral system.
Can OMDs affect facial and dental development?
Yes. The way a child breathes, swallows and positions their tongue can significantly influence the development of the palate, jaw and dental arch. A tongue that rests low or forward does not provide the natural pressure needed to help widen the palate. Over time, this can contribute to a narrow arch, crowded teeth or open bites. Chronic mouth breathing may also impact facial growth, leading to longer facial structure, flared lips or a recessed chin. Working closely with orthodontists, ENT specialists and myofunctional therapists can create a coordinated treatment plan that supports both function and facial development.
How are Oro-myofunctional Disorders assessed?
Assessment involves a comprehensive look at breathing patterns, oral posture, swallowing mechanics, tongue movement, facial muscle tone and feeding skills. The Speech and Language Therapist may also examine the structure of the jaw, palate and tongue, observe speech production and ask about sleep quality or snoring. Because OMDs frequently overlap with airway concerns, families may be referred to ENT specialists, dentists or orthodontists for further evaluation. The assessment process helps identify the root cause of the child’s difficulties so therapy can be targeted and effective.
Will my child outgrow an OMD without treatment?
Most children do not “grow out of” myofunctional patterns without support. The longer an OMD persists, the more it can influence facial development, dental alignment, sleep quality and speech patterns. Early intervention leads to the best outcomes because young muscles and structures adapt more easily. Even older children and teenagers can make excellent progress with therapy, though treatment may require more time and consistency.
When should I seek help?
If you notice ongoing mouth breathing, tongue-forward swallowing, unclear speech, feeding challenges or orthodontic concerns linked to oral posture, an assessment is recommended. The earlier OMDs are identified, the easier it is to retrain the underlying patterns and support healthy development. At Write2Talk, we work collaboratively with families to understand the child’s needs, provide clear guidance and build a therapy plan that supports long-term progress.
What Are Oro-myofunctional Disorders?
Oro-myofunctional disorders (OMDs) involve atypical tongue, lip or jaw movements that interfere with normal oral function. These patterns are often habitual and may develop long before a child begins speaking.
Common OMDs include:
- Tongue thrust (tongue pushes forward during swallowing or speech)
- Low resting tongue posture
- Open-mouth posture or mouth breathing
- Poor lip seal
- Inconsistent or weak oral motor coordination
Signs & Indicators
Your child may benefit from assessment if they:
- Struggle to produce /s/, /z/, /t/, /d/, /n/, or “ch” sounds
- Have an open-mouth posture or breathe through their mouth
- Push their tongue forward during speech or swallowing
- Drool or struggle with saliva control
- Have difficulty chewing certain textures
- Have orthodontic concerns (e.g., open bite)
- Fatigue easily when speaking
Causes
Causes and contributing factors may include:
- Chronic mouth breathing
- Enlarged tonsils or adenoids
- Allergies or nasal congestion
- Thumb/finger sucking
- Tethered oral tissues
- Early feeding difficulties
- Neuromuscular patterns developed during early growth
FAQ: Oro-Myofunctional Disorders (OMDs)
What does an Oro-myofunctional Disorder look like in children?
Children with OMDs may show signs such as persistent open-mouth breathing, noisy chewing, food remaining in the mouth after swallowing, or drooling beyond the typical age. Some children push their tongue forward when they swallow, have difficulty keeping their lips closed or find it challenging to coordinate movements needed for clear speech. Parents often notice that their child seems “tired” when eating, avoids certain textures or seems to work harder than expected during meals. Others may present with dental crowding, narrow palate development or orthodontic issues linked to tongue posture. These signs are often subtle on their own, but together they point toward an underlying myofunctional pattern.
What causes Oro-myofunctional Disorders?
OMDs can develop for several reasons. Some children have airway restrictions, such as enlarged tonsils, adenoids or nasal congestion, which cause them to breathe through their mouth rather than their nose. Others may have low tongue tone, restricted tongue movement (including tongue-tie), chronic allergies, early feeding difficulties or prolonged dummy/thumb sucking habits. Because the mouth, airway and facial muscles work closely together, a disruption in one area can affect overall function.
How do OMDs affect feeding and chewing?
Children with OMDs may tire quickly while eating, take a long time to finish meals or avoid foods that require sustained chewing. Some prefer softer textures because chewing feels effortful or uncoordinated. Others may swallow with their tongue pushing forward, making eating messy or inefficient. These challenges are not behavioural, they reflect the muscle patterns and coordination of the oral system.
Can OMDs affect facial and dental development?
Yes. The way a child breathes, swallows and positions their tongue can significantly influence the development of the palate, jaw and dental arch. A tongue that rests low or forward does not provide the natural pressure needed to help widen the palate. Over time, this can contribute to a narrow arch, crowded teeth or open bites. Chronic mouth breathing may also impact facial growth, leading to longer facial structure, flared lips or a recessed chin. Working closely with orthodontists, ENT specialists and myofunctional therapists can create a coordinated treatment plan that supports both function and facial development.
How are Oro-myofunctional Disorders assessed?
Assessment involves a comprehensive look at breathing patterns, oral posture, swallowing mechanics, tongue movement, facial muscle tone and feeding skills. The Speech and Language Therapist may also examine the structure of the jaw, palate and tongue, observe speech production and ask about sleep quality or snoring. Because OMDs frequently overlap with airway concerns, families may be referred to ENT specialists, dentists or orthodontists for further evaluation. The assessment process helps identify the root cause of the child’s difficulties so therapy can be targeted and effective.
Will my child outgrow an OMD without treatment?
Most children do not “grow out of” myofunctional patterns without support. The longer an OMD persists, the more it can influence facial development, dental alignment, sleep quality and speech patterns. Early intervention leads to the best outcomes because young muscles and structures adapt more easily. Even older children and teenagers can make excellent progress with therapy, though treatment may require more time and consistency.
When should I seek help?
If you notice ongoing mouth breathing, tongue-forward swallowing, unclear speech, feeding challenges or orthodontic concerns linked to oral posture, an assessment is recommended. The earlier OMDs are identified, the easier it is to retrain the underlying patterns and support healthy development. At Write2Talk, we work collaboratively with families to understand the child’s needs, provide clear guidance and build a therapy plan that supports long-term progress.
