What is proper tongue posture? — the clinical answer
Proper tongue posture — the resting position of the tongue inside the mouth when you are not speaking, eating, or swallowing — is a specific, definable thing. The tongue rests against the roof of the mouth (the palate), with the lips lightly closed and the breath passing through the nose. The body of the tongue should sit broadly against the palate; the tip should sit just behind the upper front teeth without touching them. This is the resting position the body is designed to default to. Anything else — tongue resting on the floor of the mouth, tongue pushing against teeth, mouth slightly open at rest — is a deviation from the default.
The clinical evidence for this default position is real, and it is older than the social-media interest in it. Orthodontic and orthotropic literature has examined tongue rest position since at least the 1970s, with substantial work by John Mew, Derek Mahony, and a wider research community on the relationship between resting tongue posture, facial development, and airway function. The picture that emerges is nuanced rather than dramatic, and most of the difference between the clinical evidence and the popular claims comes down to a single distinction the popular discussion routinely collapses: the difference between what tongue posture does during childhood facial development and what it does in an already-developed adult face.
This page is built around that distinction, which sits at the centre of our approach to whole-health dentistry.
Where exactly should your tongue rest?
A useful description that lets you check your own posture right now.
Tongue body: flat and broad against the entire roof of the mouth. Not just the tip — the whole body of the tongue making contact with the palate from front to back. If your tongue feels like it is hanging in the centre of your mouth, sitting on the floor of the mouth, or only touching the palate at the tip, you are not in proper posture.
Tongue tip: resting just behind the upper front teeth, in the small ridge of bone you can feel with the tip of your tongue (the incisive papilla, sometimes called "the spot"). The tip should not be pressing forward against the teeth. Forward pressure on the teeth is what produces an open bite or anterior protrusion over years.
Lips: lightly closed without forcing. If your lips have to be held shut by tension, the underlying jaw and airway picture is doing something other than what it should.
Breath: entering and leaving through the nose, not the mouth. This is the part of proper tongue posture that matters most clinically, and it is the part the popular discussion frequently underemphasises. Our article on mouth breathing and jaw development gives the honest version.
If you have just checked your tongue position and found it on the floor of your mouth or in the centre — most people do, on first check — that is not a verdict on your face or your future. It is information. What you do with it depends on whether you are an adult or a developing child, and on what other features your mouth and airway are showing.
Why tongue posture matters — the clinical evidence
The clinical evidence for tongue posture sits across three domains, and it is worth separating them honestly.
Facial development in childhood. This is the area with the strongest evidence. Sustained childhood tongue posture against the palate provides outward force on the developing maxilla, contributing to broad arch development. Childhood low tongue posture — typically associated with mouth breathing, often driven by nasal obstruction, allergies, or tongue-tie — correlates with narrower arches, vertical facial growth pattern, and increased likelihood of orthodontic crowding later. The peer-reviewed literature on this is substantial; our airway dentistry page integrates this thinking into clinical paediatric assessment.
Airway function in adults. Resting tongue posture interacts with airway dimensions in adults too. Low tongue posture is associated with more frequent upper-airway collapse during sleep, contributing to snoring and sleep-disordered breathing. The mechanism is straightforward — a tongue resting low in the mouth at night falls further back as the muscles relax in sleep, partially obstructing the airway.
Adult facial aesthetic change. This is the area with the most popular interest and the thinnest evidence. The claim — sustained adult tongue posture against the palate produces visible jaw and cheekbone changes over months to years — has limited peer-reviewed support. Some patient reports exist; controlled studies in adults are scarce. The honest scientific position is that meaningful adult facial change from tongue posture alone is plausible but unproven, and that the dramatic before-and-after images circulating on TikTok and YouTube are not representative of typical adult outcomes.
The fairest summary is this: tongue posture during childhood meaningfully influences facial development. Tongue posture in adults influences airway function. Tongue posture in adults producing visible cosmetic facial change is plausible but the evidence is limited, and the typical change is far smaller than the popular images suggest.
Tongue posture vs mewing — what's the actual difference?
The two terms get used interchangeably online; they are not the same thing.
Tongue posture is the technical, clinical term for the resting position of the tongue. It is a feature of normal anatomy and function and has been discussed in orthodontic, orthotropic, and ENT literature for decades.
Mewing is the popular term, derived from the work of orthotropist John Mew and his son Mike Mew, for the sustained practice of holding the tongue against the palate as a self-directed intervention. The term entered popular consciousness through YouTube videos in the 2010s and reached mass awareness through TikTok in the early 2020s. It has, in the process, accumulated a substantial layer of pop-aesthetic claims that the original orthotropic literature does not support.
The relationship: mewing is the practice of holding proper tongue posture. The clinical concept (tongue posture) predates the popular practice (mewing) by several decades. The clinical concept describes a body default; the popular practice repurposes that default as an aesthetic intervention.
Our dedicated page on mewing, explained by a dentist, goes deeper into the orthotropic literature and what the evidence actually shows in adults. That page is the right read if you are mewing-curious. This page is the right read if you want to understand the underlying anatomy first.
Does tongue posture change adult faces? — the honest answer
This is the question the popular content frequently overstates. The honest answer has three parts.
What is plausible. Sustained adult tongue posture produces a small upward and forward force against the palate, and over years that force may produce minor maxillary remodelling. Adult bones are not as plastic as childhood bones, but they are not entirely static — orthodontic tooth movement in adults is real, and the underlying bone does remodel slowly. So a small effect from sustained tongue posture is biologically plausible.
What is supported by clinical evidence. In adults, the supported effects are: improved muscle tone in the floor of the mouth and tongue (measurable), improved airway dimensions during sleep (measurable in patients who shift from mouth to nose breathing), and improved bite stability after orthodontic treatment (well-supported — relapse rates are lower in patients with proper tongue posture). Visible facial aesthetic change — sharper jawline, higher cheekbones, more defined facial structure — is reported anecdotally but has thin peer-reviewed support in adults.
What is overclaimed. The dramatic before-and-afters circulating online typically show changes that are larger than the evidence supports from tongue posture alone. Many such results are confounded by weight loss, changes in body fat distribution, age (most "mewing" results are reported by young adults whose facial structure is still settling), camera angle, lighting, and in some cases by additional interventions (orthodontic treatment, dental work, aesthetic medicine) that the social-media presentation omits.
The fair adult-aesthetic summary: proper tongue posture in adults can support better airway function, better orthodontic stability, and better resting facial muscle tone. The dramatic facial restructuring popularly attributed to it is, in adults, mostly not real. Where it is real, the effect is small and slow.
This is not the answer the popular content wants you to hear, but it is the answer the clinical evidence supports.
Tongue posture and your airway
The airway connection is the part of tongue posture that matters most clinically, and the part the popular discussion most often underemphasises.
A tongue resting low in the mouth — particularly during sleep — increases the likelihood of upper-airway narrowing or partial collapse. This is the mechanism behind much of adult snoring and a contributing factor in some sleep-disordered breathing patterns. Our work on airway dentistry, anti-snoring oral appliances, and airway-led orthodontic widening all interacts with this picture.
For patients whose tongue posture is consistently low, the dental-aesthetic case for change is small. The airway and sleep-quality case is substantial — and it is the case worth making.
Tongue posture and sleep quality
The sleep connection compounds the airway one. Patients who shift from mouth breathing at night to nose breathing with the tongue against the palate frequently report — and on sleep studies, demonstrably show — better sleep quality, less snoring, fewer micro-arousals, and improved daytime energy. The mechanism is the airway one above: the tongue against the palate keeps the airway more open, and nose breathing improves oxygen exchange efficiency.
If you snore loudly, wake unrested, or have a partner who reports witnessed pauses in your breathing during sleep, the conversation that matters is not tongue posture per se — it is whether you have undiagnosed sleep apnoea. The first step is your GP, who can arrange a sleep study. Dental treatment of confirmed sleep-disordered breathing — including anti-snoring oral appliances — sits within that medical pathway, not as a replacement for it.
How to assess your own tongue posture
A simple four-step check you can do now.
Step 1. Close your mouth and let your jaw rest. Where is your tongue? If it is on the floor of your mouth or in the centre, not touching the palate — that is low tongue posture.
Step 2. Now place the tip of your tongue just behind the upper front teeth (on the incisive papilla, the small bony ridge). Notice the position.
Step 3. Try to spread the body of the tongue broadly against the palate — not just the tip. The back, middle, and front of the tongue should all make contact with the roof of the mouth. Notice whether this feels easy, effortful, or uncomfortable.
Step 4. Breathe through your nose, with lips lightly closed. The tongue should stay against the palate. If it drops when you breathe through your nose, the airway and tongue may be slightly out of coordination.
This is the position you should aim to return to throughout the day. Awareness is the entire first step. Sustained re-training, where indicated, is the work of myofunctional therapy — a specific clinical discipline with trained practitioners that we work with at DWL.
Exercises to improve tongue posture
The "spot" cue. Place the tip of your tongue against the spot just behind the upper front teeth. Hold for a minute at a time, throughout the day. Build to sustained.
The "suction hold." Press the whole body of the tongue broadly against the palate, creating a gentle suction. Hold for 10-20 seconds; release; repeat.
The "swallow check." Notice what your tongue does when you swallow. If it pushes forward against the teeth (anterior tongue thrust), that pattern can be retrained — typically via myofunctional therapy with a trained practitioner.
Nose breathing all day. The single highest-impact change. Tape over the lips at night (mouth taping for sleep) is one popular method but is not safe in everyone. Daytime conscious nose breathing is universally safe and is the foundation.
For sustained re-patterning — particularly in patients with tongue-tie, longstanding myofunctional issues, or specific clinical presentations — the right next step is professional myofunctional therapy. Our article on tongue posture exercises for adults covers what the evidence supports.
When tongue posture indicates a clinical issue
Tongue posture is information, and some patterns are worth bringing to a clinical assessment.
- Persistent low tongue posture that does not respond to conscious correction may indicate a tongue-tie (ankyloglossia) — particularly in patients with a high palate, narrow upper arch, or history of orthodontic relapse. Adult tongue-tie release is a relevant conversation.
- Tongue thrust during swallowing (the tongue pushing forward against the teeth on every swallow) can perpetuate dental crowding, anterior open bite, or orthodontic relapse — and is treatable with myofunctional therapy.
- Low tongue posture with snoring, daytime fatigue, or witnessed sleep apnoea is a sleep-medicine conversation. Your GP and a sleep study are the first port of call.
- Low tongue posture combined with chronic jaw tension, TMJ symptoms, or bruxism suggests an integrated picture worth assessing — our jaw self-check is a useful starting point.
In all cases the principle is the same: considered, conservative, never rushed. The conversation is integrative — airway, posture, dental, and broader-health questions running in connection. That is the practice Dental & Wellness London was built around.
FAQs about tongue posture
Does mewing actually work in adults?
The evidence supports modest effects — improved airway function, better orthodontic stability, better resting muscle tone. The dramatic facial restructuring popularly attributed to mewing in adults is mostly not supported by peer-reviewed evidence. The honest framing is "plausible but unproven, and where real, small and slow."
Where exactly should my tongue rest?
Body of the tongue broad against the roof of the mouth (palate); tip just behind the upper front teeth on the small bony ridge (the incisive papilla); lips lightly closed; breathing through the nose.
How long does it take to change tongue posture?
Awareness — immediate. Sustained subconscious correction — typically weeks to months of conscious practice. Visible facial change in adults — limited evidence, but where reported, typically 12-24 months of sustained practice.
Is mouth taping at night safe?
Not universally. Mouth taping is contraindicated in suspected or diagnosed sleep apnoea, in patients with nasal obstruction, and in some neurological conditions.
Does tongue posture affect facial appearance in children?
Yes — meaningfully and with substantial peer-reviewed support. Childhood facial development is influenced by sustained tongue posture against the palate. This is the clinical foundation of airway-led paediatric orthodontic thinking.
Can tongue posture cure sleep apnoea?
No. Proper tongue posture can support better airway function and is part of a comprehensive approach to sleep-disordered breathing. But sleep apnoea is a medical diagnosis that requires a sleep study, and its treatment sits within medical management — including, where appropriate, CPAP, oral appliances, surgical options, and lifestyle factors. We do not present tongue posture as a cure for sleep apnoea.
Do I need to see a specialist for tongue posture issues?
For most adults, no — awareness and conscious practice is the starting point. Where awareness alone does not produce change, where you suspect tongue-tie, or where the picture connects to TMJ, airway, or sleep issues, a myofunctional therapy assessment is the right next step.
How does tongue posture connect to TMJ pain?
Chronic mouth breathing and low tongue posture often coincide with the postural and muscle-tension patterns underlying TMJ disorder. Addressing the airway and tongue posture side often improves the jaw side in parallel.
Where can I get clinical assessment of my tongue posture in London?
At Dental & Wellness London we do integrated assessments — airway, tongue posture, jaw position, and the broader airway-dentistry picture — as standard. We begin with a free 20-minute discovery call, then a dental examination (£65) where clinically needed.
About the author — Dr Vee Patel
This page was written by Dr Vishal Patel — BDS Liverpool · MSc Aesthetic & Restorative Dentistry (Manchester) · GDC 103127 · Invisalign Diamond II Provider · AACD Member · founder of Dental & Wellness London since 2009. The clinical perspective offered here reflects sustained engagement with the orthotropic, orthodontic, and airway-dentistry literature, alongside around 20 years of clinical practice integrating these threads with mainstream dentistry.
Phone: 020 8127 4567
WhatsApp: +44 7974 910222 (8am–7pm)
Address: Dental & Wellness London, 222 Essex Road, Islington, London N1 3AP.
Reviewed by Dr Vishal Patel · BDS (Liverpool) · MSc Aesthetic & Restorative Dentistry (Manchester) · GDC 103127 · Invisalign Diamond II Provider · clinic founder since 2009. Last reviewed 2026-06-12.
