Tongue thrust, the habit of pressing your tongue forward against or between your teeth during swallowing, at rest, or while speaking, is one of the most common orofacial habits and one of the most fixable. Most people who deal with it need a combination of retraining exercises (called orofacial myofunctional therapy), awareness of what is driving the pattern, and sometimes a dental appliance or procedure to address an underlying cause. The challenge is that your tongue exerts force thousands of times a day every time you swallow, so even light forward pressure adds up and can shift teeth over time.
Why Your Tongue Pushes Forward in the First Place
When you were an infant, your tongue naturally thrust forward during swallowing. That is how babies nurse. As you grew, the pattern was supposed to transition to a mature swallow where the tongue tip presses up against the ridge behind your upper front teeth (the “spot”) and the rest of the tongue lifts toward the palate. Research on this transition shows it is gradual, with the tongue tip and sides progressively elevating as the jaws come together and the tongue learns to stay contained within the dental arch. What clinicians call a “tongue thrust” is really a delayed intermediate stage in that normal transition rather than a habit in the traditional sense.1Archives of Oral Biology. Lingual pressure patterns in the transition from tongue thrust to adult swallowing
But some people never fully complete that transition, and there are several reasons why:
- Thumb or pacifier sucking: Prolonged sucking habits during childhood significantly increase the likelihood of retaining a tongue-thrust swallow. Both finger-sucking and pacifier use push the tongue into a low, forward position and can reshape the palate in ways that make correct tongue posture harder to achieve.2European Journal of Orthodontics. Sucking habits and their influence on swallowing pattern and prevalence of malocclusion
- Mouth breathing: If you breathe through your mouth rather than your nose, your tongue drops to the floor of your mouth to keep the airway open. A systematic review and meta-analysis found that mouth breathers are roughly 3.7 times more likely to develop an atypical swallowing pattern than nose breathers.3Multidisciplinary Digital Publishing Institute (MDPI). Mouth Breathing and Its Impact on Atypical Swallowing: A Systematic Review and Meta-Analysis
- Enlarged adenoids or tonsils: These can physically block the nasal airway, forcing mouth breathing and the low tongue posture that goes with it.4PubMed Central. Orofacial Myofunctional Therapy in Tongue Thrust Habit: A Narrative Review
- Tongue tie: A tight or short lingual frenulum (the band of tissue under the tongue) can physically restrict the tongue from reaching the palate, keeping it low and forward. In one documented case, a toddler with a posterior tongue tie showed significantly impaired tongue-base movement and swallowing dysfunction; after the tissue was released surgically, tongue movement and swallowing improved dramatically.5SpringerLink / Dysphagia. Posterior Tongue Tie, Base of Tongue Movement, and Pharyngeal Dysphagia: What is the Connection?
The common thread is that any condition keeping the tongue low and forward during development can prevent the mature swallowing pattern from locking in. That is why the first step in stopping tongue thrust is figuring out whether something structural or habitual is holding the pattern in place.
What Tongue Thrust Does to Your Teeth
Your tongue is a powerful muscle, and it does not need to push hard to move teeth. It just needs to push often. Every time you swallow, speak, or rest with your tongue pressed against your front teeth, you are applying force. Over months and years, that force can flare the upper front teeth outward, create gaps between teeth, and open up the bite so the upper and lower front teeth no longer overlap when you close your jaw. This last condition, called anterior open bite, is the signature dental problem linked to tongue thrust.
The mechanics are straightforward. In people with open bite, the tongue sitting forward at rest or pressing forward during swallowing exerts constant outward pressure on the teeth. At the same time, the lip muscles in these individuals tend to be weak, so they do not provide enough inward counter-pressure to balance the tongue. The result is that the upper incisors tip forward and the open bite worsens.6PubMed Central. Tongue Behavior in Anterior Open Bite—A Narrative Review
There is a chicken-and-egg question researchers have wrestled with for decades: does the tongue thrust cause the open bite, or does an existing open bite give the tongue nowhere else to go? The honest answer is that it runs both directions. But regardless of which came first, the forward tongue posture maintains the problem and makes it worse over time, which is why correcting the tongue habit is necessary for any lasting fix.
Exercises That Retrain Your Tongue
The primary non-surgical, non-appliance treatment for tongue thrust is orofacial myofunctional therapy, or OMT. This is essentially physical therapy for your mouth. A myofunctional therapist (often a specially trained speech-language pathologist or dental hygienist) teaches you exercises to strengthen the tongue and retrain its resting position and swallowing pattern. Studies show that OMT can significantly improve tongue strength and orofacial function scores in people with tongue thrust.7PubMed. Impact of Oral Myofunctional Therapy on Orofacial Myofunctional Status and Tongue Strength in Patients with Tongue Thrust
Some of the core exercises you will encounter include:
- Tongue spot holds: Place the tip of your tongue on the ridge just behind your upper front teeth (not touching the teeth themselves). Hold it there while swallowing and try to maintain it at rest. Some therapists use a small piece of gum or a gelatin candy placed on that spot to help you find and remember the position.8PubMed Central. Tongues Tied by Orofacial Myofunctional Therapy about Tongue Tie: A Narrative Review
- Palate seal breakers (tongue clicks): Take a sip of water, hold your tongue at the “spot,” create suction against your palate, then break the seal with a clicking sound. Repeat about ten times. This builds strength in the muscles that hold the tongue up against the roof of the mouth.8PubMed Central. Tongues Tied by Orofacial Myofunctional Therapy about Tongue Tie: A Narrative Review
- Smile-clench-swallow: One clinician-developed exercise involves smiling broadly (to activate the lip and cheek muscles), clenching the back teeth together, then swallowing with the tongue pressing up rather than forward. A case report documented this approach maintaining an open-bite correction for over five years after orthodontic treatment.9AJO-DO Clinical Companion. A 17-year case report: Smile-clenching-swallowing exercise treatment to control tongue behavior and posture of anterior open bite
The key with all of these is consistency. You swallow somewhere around 500 to 2,000 times a day, so the new pattern has to become completely automatic. Most therapy programs run for several months, with daily home practice. That said, a scoping review of the OMT literature found that while therapy does produce measurable clinical changes, the overall quality of evidence remains limited, and results vary depending on the person and the underlying cause.10PubMed Central. Effectiveness of orofacial myofunctional therapy in improving orofacial function and oral habits: a scoping review Therapy works best when the person is motivated and practices consistently, which is something clinicians have noted repeatedly.
Dental Appliances for Tongue Thrust
When exercises alone are not enough, or when the habit is deeply entrenched, orthodontists and pediatric dentists sometimes use appliances that physically block the tongue from pushing forward. The most common is a tongue crib: a metal framework cemented to the upper back teeth with small vertical bars or a cage behind the upper front teeth. The bars do not hurt, but they prevent the tongue from reaching the front teeth, essentially serving as a constant physical reminder to keep the tongue back.
A case report involving a modified tongue crib used for six months showed significant improvement in the position of the upper front teeth, closure of a gap between the central incisors, and improved lip posture. Tongue cribs work by retraining the relevant muscles while also providing a physical barrier.11PubMed Central. A Modified Tongue Crib Appliance for Correction of Tongue Thrusting Newer designs include clear (removable) tongue cribs and tongue cages, which clinical trials suggest can lead to lasting improvements in tongue positioning when used consistently under professional supervision.12PubMed Central. Tongue Retraining Appliance: Clear Tongue Crib and Clear Tongue Cage Appliance
Appliances are not a magic fix on their own. They work best in combination with exercises and, when needed, treatment of the underlying cause. Think of the crib as training wheels: it prevents the wrong movement while your muscles learn the right one, but the muscles still have to learn.
Why Fixing the Underlying Cause Matters
If the reason your tongue sits forward is that you cannot breathe through your nose, no amount of tongue exercises will produce a lasting change while the airway problem persists. This is one of the most common situations clinicians see: a patient does tongue exercises diligently but makes limited progress because chronic nasal congestion, allergies, or enlarged adenoids and tonsils keep forcing mouth breathing.
When enlarged tonsils or adenoids are the culprit, surgical removal (adenotonsillectomy) can open the nasal airway enough for nose breathing to resume. Research shows that after adenotonsillectomy, children tend to shift toward nasal breathing, and posture markers associated with mouth breathing (like a forward head position) improve significantly.13PubMed. The effect of adenotonsillectomy on the position of head, cervical and thoracic spine and scapular girdle of mouth breathing children Once the airway is clear, the tongue can physically reach the palate and the exercises become far more effective.
Similarly, if a tongue tie is restricting your range of motion, a frenectomy (clipping the tight tissue) can free the tongue to adopt its correct resting position. Post-surgical exercises are especially important after a frenectomy, because the tongue needs to learn the positions it was never able to reach before.8PubMed Central. Tongues Tied by Orofacial Myofunctional Therapy about Tongue Tie: A Narrative Review
The Connection Between Tongue Thrust and Speech
If your tongue pushes forward when you speak, you may notice a lisp or imprecise pronunciation of certain sounds. The sounds most commonly affected are /s/, /z/, /t/, /d/, /n/, and /l/, all of which normally require the tongue tip to touch or approach the ridge behind the upper front teeth. When the tongue pushes through or against the teeth instead, those sounds come out distorted. Research has found a significant relationship between open bite and anterior lisping, particularly in the articulation of the sounds /t/, /d/, /n/, and /l/.14Brazilian Oral Research. Vertical interincisal trespass assessment in children with speech disorders
A study of children seeking orthodontic treatment found higher rates of articulation disorders for /s/, /n/, /l/, and /t/ compared to controls, along with more frequent tongue thrust during swallowing and an anterior tongue position at rest.15PubMed. Articulation and oromyofunctional behavior in children seeking orthodontic treatment The good news is that correcting the tongue posture often improves speech at the same time, though some people benefit from working with a speech-language pathologist in addition to a myofunctional therapist (and in many cases, the same clinician handles both).
Why Orthodontic Work Alone Often Is Not Enough
One of the most frustrating experiences people report is having braces close an open bite, only to watch it reopen after the braces come off. This happens because the orthodontic appliances move the teeth, but the tongue is still pushing them forward. Unless the tongue habit is corrected, the same force that created the problem will recreate it.
A compelling illustration comes from a case study of identical twins who both had anterior open bites and received similar orthodontic treatment plans. In the twin who successfully eliminated the tongue thrust through myofunctional exercises, the open bite closed fully and showed no relapse at follow-up. In the twin who did not manage the tongue thrust, the correction was only partial and the bite showed a tendency to reopen.16PubMed Central. A comparative evaluation of anterior open bite orthodontic treatment outcomes and stability of results in monozygotic twins Same genetics, same treatment plan, different outcomes based on whether the tongue habit was addressed.
Broader data confirms this pattern. A study comparing open-bite patients who received orthodontic treatment with OMT versus orthodontic treatment alone found dramatically different relapse rates. The group that did myofunctional therapy alongside orthodontics had an average relapse of only about half a millimeter, while the group that had orthodontics alone relapsed an average of about 3.4 millimeters.17PubMed. Relapse of anterior open bites treated with orthodontic appliances with and without orofacial myofunctional therapy That difference is clinically enormous: it is the difference between a stable result and one that largely undoes the treatment.
How a Clinician Identifies Tongue Thrust
You might already know you push your tongue forward because you can feel it or see it between your teeth. But clinical assessment is worth pursuing, because tongue thrust is not always obvious. The classic diagnostic method is simple: a dentist or therapist asks you to swallow several times while they watch. If the tongue visibly protrudes between the upper and lower front teeth during the swallow, tongue thrust is present.18PubMed Central. Effect of Tongue Thrust Swallowing on Position of Anterior Teeth Sometimes the examiner will place a finger lightly under your chin to feel whether the tongue is pushing forward or up during swallowing.
A more thorough assessment also evaluates your resting tongue position (does your tongue sit against the palate or low in the mouth?), your lip seal at rest (are your lips comfortably closed or apart?), and whether you habitually breathe through your mouth. These factors together paint a picture of whether the tongue thrust is isolated or part of a broader orofacial myofunctional pattern. Seeking this kind of evaluation from an orthodontist, a myofunctional therapist, or an ENT specialist (if airway issues are suspected) is the most efficient way to figure out what combination of interventions you actually need.
The Soft-Diet Theory and Modern Jaw Development
There is a wider context worth knowing about. Some researchers argue that the modern human diet, which is far softer than what our ancestors ate, plays a role in underdeveloped jaws, crowded teeth, and the incorrect oral postures (including tongue thrust) that follow. The idea is that reduced chewing during development leads to weaker jaw muscles and smaller jaws, which in turn leave less room for the tongue and make proper tongue posture harder to maintain. This dietary shift over the last several thousand years may have contributed to the transition from edge-to-edge bites to the overbites and overjets that are now considered normal, and it appears to foster the kind of incorrect swallowing pattern that characterizes tongue thrust.19BioScience. The Jaw Epidemic: Recognition, Origins, Cures, and Prevention
This does not mean you need to start chewing jerky for hours a day. But it does suggest that the problem of tongue thrust is partly a mismatch between how our jaws develop in a modern soft-food environment and what our oral anatomy is designed for. Some clinicians incorporate chewing exercises (using firm gum or chew toys designed for the purpose) into their treatment plans for this reason, aiming to build jaw and tongue strength alongside the postural retraining.
Airway, Sleep, and the Bigger Picture
Tongue posture does not just affect your teeth. A tongue that habitually sits low and forward is associated with a narrower airway, and this has implications for sleep. Research on adults with obstructive sleep apnea has found that a larger tongue combined with a lower-positioned hyoid bone (the small bone that anchors the tongue) correlates with more severe disease. People with more severe apnea also tended to carry their heads further forward, a postural compensation that opens the airway slightly but creates its own problems.20European Journal of Orthodontics. Natural head posture, upper airway morphology and obstructive sleep apnoea severity in adults
This is not to say that tongue thrust causes sleep apnea. The relationship is more that both conditions share overlapping anatomy: a tongue that does not sit properly against the palate is a tongue that may fall backward during sleep and partially obstruct breathing. Myofunctional therapy is being studied as a complementary treatment for mild sleep apnea for exactly this reason, though the evidence base is still developing. If you snore heavily, wake up with a dry mouth, or feel unrested despite a full night of sleep, bringing up your tongue posture with a sleep specialist or ENT could be worthwhile alongside the dental conversation.