Tongue thrust is a swallowing and resting pattern where the tongue pushes forward against or between the front teeth instead of resting on the roof of the mouth. It is normal in babies, but if it persists in older children, it can affect the bite, speech, and how the teeth line up. A pediatric dentist can spot it and guide the right support. Call (760) 744-8600.
“Tongue thrust” sounds technical, but it describes something simple: the way the tongue moves and rests. Every baby swallows with a forward tongue motion, and that is completely normal. As children grow, the pattern usually matures. When it does not, the constant forward pressure of the tongue can nudge teeth out of position and shape the bite over time. At San Marcos Kids Dentistry, we keep an eye on these patterns because catching them early makes them easier to support.
What Does Tongue Thrust Look Like?
You might notice tongue thrust if your child:
- Rests their tongue between or against the front teeth
- Pushes the tongue forward when swallowing
- Keeps the mouth open at rest, with the tongue low or forward
- Has trouble with certain sounds, like “s” or “z”
- Is developing an open bite, where the front teeth do not meet
One or two of these alone do not confirm anything, but together they are worth mentioning at a dental visit.
Why Does Tongue Thrust Happen?
Tongue thrust often travels with other oral habits and patterns, including:
- Prolonged thumb-sucking or pacifier use
- Chronic mouth breathing or nasal congestion
- Enlarged tonsils or adenoids that change how the tongue rests
- A tongue-tie that limits normal tongue movement
Because these factors are connected, we look at the whole picture rather than just one symptom.
When Does Tongue Thrust Matter?
A forward swallow is expected in infants and toddlers. It becomes more significant when it persists as the permanent teeth come in, because the repeated pressure can contribute to:
- An open bite (front teeth that do not touch)
- Flared or protruding front teeth
- Speech sound differences
- Orthodontic relapse, where teeth drift back after treatment
The earlier the pattern is noticed, the more naturally it can be addressed alongside a child’s growth.
How Is Tongue Thrust Addressed?
There is no one-size-fits-all answer, because it depends on the cause. Support may include:
- Treating the root cause, such as allergies, mouth breathing, or a tongue-tie
- Myofunctional therapy, gentle exercises that retrain how the tongue rests and swallows
- Guiding jaw and bite development at the right age, sometimes with early orthodontic care
- Coordinating with a speech-language therapist when speech is affected
We start by screening and identifying contributing factors, then help you build the right plan. This connects to our broader airway and breathing approach, because how a child breathes and how the tongue rests are closely linked.
Frequently Asked Questions
Q: Is tongue thrust normal?
A: In babies and young toddlers, yes. It is the persistence of the pattern in older children, as permanent teeth arrive, that may need attention.
Q: Can tongue thrust cause an open bite?
A: It can contribute to one. The constant forward pressure of the tongue against the front teeth is one factor that can lead to an open bite over time.
Q: How is tongue thrust corrected?
A: By addressing the cause and, when appropriate, using myofunctional exercises and guided bite development. The right approach depends on your child.
Q: Does tongue thrust affect speech?
A: It can affect certain sounds. When speech is involved, we coordinate with a speech-language therapist as part of the plan.
En Español: ¿Qué Es el Empuje Lingual (Tongue Thrust)?
El empuje lingual ocurre cuando la lengua empuja hacia adelante contra los dientes o entre ellos, en lugar de descansar en el paladar. En los bebés es normal, pero si continúa en niños mayores, puede afectar la mordida, el habla y la alineación de los dientes.
Algunas señales son: la lengua descansa entre los dientes de adelante, su hijo empuja la lengua al tragar, mantiene la boca abierta, o está desarrollando una mordida abierta. El empuje lingual suele acompañar otros hábitos, como chuparse el dedo, la respiración por la boca o un frenillo corto (tongue-tie).
Un dentista pediátrico puede observar el patrón a tiempo y, según la causa, recomendar terapia miofuncional, tratar la causa de fondo o guiar el desarrollo de la mordida en el momento adecuado. Hablamos español. Llame a San Marcos Kids Dentistry al (760) 744-8600.
Ask About Your Child’s Bite in San Marcos
If you have noticed your child’s tongue resting forward or an open bite forming, a screening can help. Call San Marcos Kids Dentistry at (760) 744-8600 or request an appointment online. Find our hours and directions on our San Marcos office page.