If you’ve been told your child has a tongue thrust, or you’ve noticed an open-mouth posture, messy swallowing, or a persistent lisp, it’s natural to wonder whether tongue posture is contributing to speech sound errors.
Families often land here after searching:
- “tongue thrust lisp”
- “tongue thrust speech”
- “myofunctional therapy”
- “orofacial myofunctional therapy”
- “mouth breathing treatment”
- “speech therapy near me”
Here’s the balanced clinical answer:
Tongue thrust can be associated with certain speech sound errors for some children—especially /s/ and /z/ distortions—but it is not the cause of every articulation disorder. The right next step is to evaluate both speech patterns and oral function patterns and decide whether speech therapy, myofunctional therapy, or a combined plan is indicated.
Quick Take
- Tongue thrust is a pattern where the tongue moves forward during swallowing and may rest forward at rest.
- It can co-occur with a frontal lisp and other speech sound distortions.
- Myofunctional therapy may help when oral posture and function patterns are contributing, especially alongside mouth breathing or orthodontic concerns.
What is tongue thrust?
Tongue thrust is most commonly used to describe:
- a forward tongue movement during swallowing, and/or
- a forward tongue resting posture
Many clinicians also consider related oral function patterns such as:
- lips apart at rest
- open-mouth posture
- mouth breathing
- low tongue resting posture
The important point is that speech is built on the resting and functional patterns of the oral structures—but speech also involves learned motor patterns that can be independent of swallowing.
How tongue thrust can affect speech
Tongue thrust is most commonly linked to distortions for sounds that require the tongue tip to stay behind the teeth with controlled airflow.
Sounds most often impacted
- /s/ and /z/ (lisp-type distortions)
- sometimes “sh,” “ch,” “j”
- occasionally /t/, /d/, /n/, /l/ if placement is consistently forward
If the tongue routinely moves between the teeth, airflow and placement cues for these sounds can be harder to stabilize.
Tongue thrust does not explain every speech sound disorder
Many children with articulation disorders have no tongue thrust. Many children with tongue thrust speak clearly.
That’s why a good evaluation avoids simplistic cause-and-effect assumptions and looks at:
- the exact speech error pattern
- whether the child can produce the sound correctly with cues (stimulability)
- resting posture and swallow pattern
- co-occurring factors like mouth breathing
The triangle: mouth breathing, tongue posture, and speech
Families often notice several things together:
- mouth breathing
- open-mouth posture
- snoring or restless sleep
- crowded teeth or orthodontic concerns
- lisp or unclear speech
Not every child with mouth breathing needs myofunctional therapy, but mouth breathing can influence oral posture and the “starting position” for speech.
If you’re concerned about mouth breathing treatment, this is a good area to discuss with a team that considers airway, oral function, and speech together.
What is orofacial myofunctional therapy?
Orofacial myofunctional therapy is therapy aimed at improving oral function patterns such as:
- tongue resting posture
- lip seal
- swallowing patterns
- nasal breathing habits (when medically appropriate)
People may also call it:
- myofunctional therapy
- oro myofunctional therapy
It is often used alongside dental/orthodontic care and can be coordinated with speech therapy when speech distortions are present.
When myofunctional therapy can help speech outcomes
Myofunctional therapy may be helpful when:
- a lisp is associated with forward tongue posture
- the child cannot maintain tongue placement for /s/ and /z/
- oral resting posture is consistently open
- mouth breathing is present
- swallow pattern is clearly thrusting and persistent
- orthodontic providers have identified myofunctional patterns affecting stability
In these cases, combining myofunctional therapy with articulation therapy can improve the stability of speech targets.
What evaluation should include
If tongue thrust and speech are both concerns, the evaluation should typically include:
Speech evaluation
- speech sample
- intelligibility estimate
- articulation vs phonological pattern analysis
- stimulability testing
Oral function evaluation
- resting posture assessment
- swallow observation
- breathing habits screening (nasal vs mouth)
- screening for tongue tie concerns when relevant
This helps determine whether the plan should be:
- speech therapy only
- myofunctional therapy only
- a coordinated approach
If you’re searching “speech therapy near me”
Ask these questions to avoid fragmented care:
- Will you evaluate both speech sound errors and oral function patterns?
- If tongue thrust is present, how do you decide whether myofunctional therapy is indicated?
- Do you coordinate with dental/orthodontic or airway providers when needed?
- What does home practice look like and how will progress be measured?
If travel is difficult, ask whether the clinic offers online speech therapy or virtual speech therapy for coaching and home programs. Some components of myofunctional therapy and articulation therapy can be supported via telehealth when appropriate.
Where BreatheWorks fits
BreatheWorks is a speech-language pathology practice with a whole-patient approach that supports patients from infancy through geriatrics. Care may include speech/voice, feeding/swallowing, orofacial myofunctional therapy (OMT/OMD), and TMJ, with an emphasis on root-cause assessment across areas like sleep and breathing when relevant. You can start with in-person care at a clinic or choose secure virtual therapy with the same patient-centered model.
FAQ: Tongue Thrust and Speech
What is tongue thrust?
Tongue thrust is a forward tongue movement during swallowing and/or a forward tongue resting posture that can affect oral function patterns.
Can tongue thrust cause a lisp?
Tongue thrust and forward tongue posture can be associated with a frontal lisp for some children, especially /s/ and /z/ distortions. An evaluation can determine whether the lisp is related to posture and whether myofunctional therapy is relevant.
Does my child need myofunctional therapy or speech therapy?
It depends. If the main issue is sound production, articulation therapy may be primary. If oral posture and swallow patterns are contributing and persistent, myofunctional therapy may be added. Many children benefit from a coordinated plan.
Is mouth breathing related to tongue thrust?
Mouth breathing can influence oral posture and tongue resting position. If mouth breathing is chronic, discuss medical evaluation for airway factors and ask whether oral function therapy is appropriate.
Can tongue tie (ankyloglossia) cause tongue thrust or speech issues?
Tongue tie can affect tongue mobility for some children, but not every tongue tie causes speech or swallowing problems. A skilled evaluation can determine whether mobility is impacting function.
