Tongue thrust is a swallowing pattern where the tongue pushes forward against or between the teeth, instead of pressing up against the roof of the mouth the way it’s supposed to. It’s one of the most common orofacial myofunctional disorders, and while it often starts in early childhood, it can persist into adulthood if never addressed, affecting everything from dental alignment to speech.
What Causes Tongue Thrust?
Tongue thrust often develops from habits in infancy and early childhood, including prolonged thumb-sucking, pacifier use past toddler years, or bottle-feeding patterns that carry over into an incorrect swallow. In other cases, it’s linked to chronic nasal congestion or enlarged tonsils, which push the tongue forward and down to make room for breathing. Tongue-tie can also contribute, since restricted tongue mobility sometimes forces a forward compensation pattern. Whatever the origin, once the pattern is established, it tends to repeat itself thousands of times a day with every swallow, reinforcing itself over time.
Signs of Tongue Thrust
- Tongue visibly pushing against or between the front teeth during swallowing
- An open bite, where the front teeth don’t touch when the back teeth are closed
- Speech difficulty, particularly with s, z, and th sounds
- Teeth that have drifted forward or spread apart over time
- Resting with the tongue low and forward rather than against the roof of the mouth
- Orthodontic relapse after previously straightened teeth
Many of these signs overlap with other myofunctional disorders, which is why a full evaluation is usually needed to confirm tongue thrust specifically. We cover the broader range of signs to watch for in Signs Your Child May Need Myofunctional Therapy.
Why Tongue Thrust Matters for Dental Development
Every time a forward-pushing swallow occurs, it places outward pressure on the front teeth. Over thousands of repetitions, this pressure can gradually shift teeth forward, create or worsen an open bite, and undo the results of orthodontic treatment. This is one of the main reasons dentists and orthodontists often recommend correcting tongue thrust before, or alongside, braces or aligners, rather than after.
Tongue Thrust and Speech
Because a proper swallow and clear speech both depend on correct tongue placement, tongue thrust frequently shows up as a speech issue too, most often with sounds that require the tongue tip to stay behind the teeth. If a child’s speech therapy progress has stalled on these specific sounds, tongue thrust is worth ruling out. Our article on How Myofunctional Therapy Helps with Speech Delays looks at this connection more closely.
How Tongue Thrust Is Diagnosed
Diagnosis typically involves a provider watching the patient swallow, checking resting tongue posture, and evaluating bite alignment. In many cases, the pattern is also connected to tongue-tie or chronic mouth breathing, so a full evaluation usually looks at those factors together rather than treating tongue thrust as an isolated issue.
How Tongue Thrust Is Treated
Tongue thrust is corrected through myofunctional therapy, a series of targeted exercises that retrain the tongue to rest and move correctly during swallowing. Treatment usually starts with building awareness of the incorrect pattern, then progresses to practicing a corrected swallow in isolation before applying it to everyday eating and drinking. This is one of the more involved parts of a myofunctional therapy program, and consistency matters more than speed. A general overview of the exercises involved is available in Myofunctional Therapy Exercises You Can Do at Home.
If a structural issue like tongue-tie is contributing to the pattern, that’s often addressed first or alongside therapy, since limited tongue mobility can make it physically difficult to fully correct the swallow. Learn more about this on our frenectomy care page.
Does Tongue Thrust Go Away on Its Own?
Occasionally, a mild pattern resolves as a young child’s oral habits mature. But a persistent tongue thrust rarely corrects itself without intervention, especially once it’s been in place for several years, and it tends to keep affecting dental alignment and speech the longer it goes unaddressed.
Frequently Asked Questions
Is tongue thrust the same as a tongue-tie?
No, though they’re related. Tongue-tie is a physical restriction of tongue movement, while tongue thrust is a swallowing pattern. Tongue-tie can sometimes cause or worsen tongue thrust.
Can adults have tongue thrust?
Yes. Many adults have had an uncorrected tongue thrust since childhood, often showing up as orthodontic relapse or ongoing speech patterns. See Does Myofunctional Therapy Work for Adults? for more.
Will braces fix tongue thrust?
Braces move teeth, but they don’t correct the muscle pattern causing the movement. Without addressing tongue thrust directly, teeth often relapse after treatment ends.
If you suspect tongue thrust in yourself or your child, schedule an evaluation at our Chapel Hill, NC office, serving families throughout Chapel Hill, Durham, Carrboro, and the greater Triangle area.