The short answer: No. Current scientific evidence does not support the claim that consciously changing your tongue posture can reliably straighten crooked teeth or reshape your jawline. The viral trend known as "mewing" has been publicly warned against by the American Association of Orthodontists (AAO), which states there is "no scientific evidence to support its claims of reshaping the jawline, and the potential risks outweigh any unproven benefits."
That said, the relationship between your tongue and your dental arch is real and clinically relevant. The issue is not whether tongue posture matters at all — it is whether deliberately forcing your tongue into a specific position can substitute for orthodontic treatment. This article breaks down what the research actually shows, where the viral claims go wrong, and what legitimate therapy looks like when tongue posture does play a role.
What Is "Mewing" and Where Did It Come From?
Mewing is a technique popularized online that involves intentionally positioning the tongue flat against the roof of the mouth, with the back of the tongue resting on the palate and the tip just behind the front teeth. Proponents claim that maintaining this position consistently can:
- Sharpen the jawline
- Widen the upper jaw
- Straighten crooked teeth
- Improve facial symmetry
- Prevent the need for braces or aligners
The technique is named after John Mew, a British orthodontist who promoted a practice called "orthotropics." Mew lost his license due to unsupported claims, and his son, Mike Mew, was later struck off the dental register by the General Dental Council for malpractice. Despite this, the trend exploded on TikTok, YouTube, and other social platforms, particularly within "looksmaxxing" communities seeking quick facial improvements.
The Scientific Evidence: What the Research Actually Shows
The core problem with mewing claims is that they confuse a correlation with a causal treatment.
Studies do show that tongue posture is associated with dental arch development. For example, a 2025 study in Cureus found that Class II malocclusion patients exhibited lower tongue posture, increased tongue length, and deeper palatal vaults, which "may contribute to maxillary constriction and malocclusion." Another study from 2019 found a "moderate to weak correlation between tongue posture and dental arch widths."
But here is the critical distinction: these studies describe the tongue as one factor among many in a complex system that includes genetics, bone growth, muscle development, and overall craniofacial structure. They do not demonstrate that consciously repositioning your tongue can reverse an existing malocclusion or move teeth into a straighter position.
The AAO is direct on this point: "Facial restructuring is not simply achievable by changing your tongue's resting position. It's a complex process that involves moving jaw bones, facial bones, and soft tissue." Orthodontic appliances like braces and aligners use "gentle, consistent pressure to shift teeth and influence jaw position" according to specific biological principles — not random muscular force.
Why Before-and-After Photos Are Misleading
One of the most persuasive elements of the mewing trend is the proliferation of dramatic before-and-after photos. These are notoriously unreliable. A person's face can look significantly different in two photographs due to changes in lighting, camera angle, head position, facial expression, weight, age, facial hair, or even the camera lens and distance used.
No photograph can prove that tongue posture caused a change. It can only show that something changed — and in most cases, that something has nothing to do with the tongue.
The Real Risks of DIY Mewing
Forcing your tongue into an unnatural position for extended periods is not a neutral activity. The tongue is one of the strongest muscles in the body, and improper pressure can cause real harm. The AAO warns of several specific risks:
- Tooth misalignment: Chronic pressure from mewing can loosen teeth, misalign the bite, and contribute to tooth wear and tear.
- Speech impediments: Altered tongue placement can affect speech patterns and clarity, causing slurring or pronunciation difficulties.
- TMJ problems: Ironically, mewing can worsen jaw tension and temporomandibular joint (TMJ) disorders by encouraging clenching and unnatural muscle activation.
- Worsened crowding: Mewing can actually make teeth more crooked, not less, especially in children and teenagers whose dental structures are still developing.
The AAO has documented cases of people who ended up with crooked teeth, trouble chewing or speaking, and other oral health issues as a direct result of attempting mewing.
The Legitimate Side: Myofunctional Therapy vs. DIY Mewing
This is where the conversation becomes more nuanced. There is a legitimate clinical field called orofacial myofunctional therapy (OMT) that addresses tongue posture and oral muscle function. But it is fundamentally different from the DIY mewing trend.
| Aspect |
DIY Mewing |
Myofunctional Therapy (OMT) |
| Who performs it |
Self-directed, based on online videos |
Trained therapist or orthodontist |
| Purpose |
Reshape jaw, straighten teeth (unproven) |
Correct dysfunctional oral habits (tongue thrust, mouth breathing) |
| Evidence base |
None for teeth straightening or jaw reshaping |
Evidence supports use as adjunct to orthodontics |
| Primary goal |
Cosmetic change |
Functional stability and relapse prevention |
Myofunctional therapy is used to retrain the oral muscles when there are dysfunctional patterns like tongue thrust (where the tongue pushes forward against the teeth during swallowing) or chronic mouth breathing. In these cases, the therapy aims to establish a natural, healthy resting posture — not to force the tongue into an exaggerated position for cosmetic purposes.
A 2025 prospective study published in the Journal of Pharmacy and Bioallied Sciences found that tongue posture training significantly enhanced the posttreatment stability of orthodontic correction in Class II malocclusion patients. Patients who received tongue posture training alongside fixed orthodontic treatment had lower relapse rates at 12 months compared to those who received orthodontic treatment alone (mean PAR score change of 1.8 vs. 3.9).
Key distinction: This study did not show that tongue posture training straightened teeth on its own. It showed that proper tongue function helped keep teeth straight after they were moved by orthodontic appliances. That is a fundamentally different claim from what mewing proponents make.
When Tongue Posture Actually Matters
Tongue posture is clinically relevant in several specific scenarios:
- Post-orthodontic retention: After braces or aligners are removed, the tongue can exert forces that contribute to relapse if oral function is not balanced. This is where OMT has demonstrated value.
- Anterior open bite: In cases where tongue thrust contributes to an open bite (where front teeth don't meet), myofunctional therapy is sometimes prescribed alongside orthodontic treatment to address the underlying habit.
- Pediatric craniofacial development: In growing children, chronic oral habits like mouth breathing or tongue thrust can influence dental arch development. Early intervention may be appropriate in select cases.
In each of these scenarios, the goal is not to "mew" — it is to restore normal, functional oral posture and eliminate harmful habits. The distinction matters because mewing encourages forced tongue positioning, while OMT focuses on habit correction.
What Should You Do If You Want Straighter Teeth?
If your goal is actually straight teeth — not just the appearance of a sharper jawline in selfies — the path is well-established and evidence-based:
- Get an orthodontic evaluation. A qualified orthodontist can assess your bite, crowding, spacing, and jaw relationship, and recommend a treatment plan tailored to your specific situation.
- Consider traditional braces or clear aligners. These use controlled, continuous forces to move teeth into planned positions. They work because they follow biological principles, not because they apply random pressure.
- Ask about myofunctional therapy if appropriate. If you have tongue thrust, mouth breathing, or other oral habits that could compromise treatment stability, OMT may be recommended as an adjunct.
- Be skeptical of social media "hacks." The AAO advises against relying on unproven online trends for altering facial features. As AAO President Myron Guymon stated: "Social media is a powerful tool for informing the public, but it is not regulated by experts."
Frequently Asked Questions
Can mewing straighten teeth if I do it consistently for years?
No credible evidence supports this. Teeth move in response to sustained, controlled forces applied by orthodontic appliances — not by general muscular pressure from the tongue. In fact, improper tongue pressure can worsen crowding and misalignment.
Is proper tongue posture important at all?
Yes, but the goal is normal resting posture, not forced positioning. The tongue should rest naturally against the palate without excessive pressure. Proper oral posture supports healthy oral function and can contribute to post-orthodontic stability when combined with professional treatment.
Can mewing work for children or teenagers?
There is no evidence that mewing can straighten teeth or reshape the jaw in any age group. In children and teenagers, forcing the tongue into unnatural positions may actually worsen dental alignment because their oral structures are still developing.
What is the difference between mewing and myofunctional therapy?
Mewing is a self-directed cosmetic practice with no scientific backing for its teeth-straightening or jaw-reshaping claims. Myofunctional therapy is a clinical intervention performed by trained professionals to correct dysfunctional oral habits and support orthodontic stability. They are not the same thing.
Are there any benefits to mewing at all?
The AAO states there is "no current research that suggests the technique provides any benefit to your jawline or oral health." Some people may experience temporary changes in facial appearance due to muscle tension, but this is not the same as structural change and may come with risks like TMJ pain and speech difficulties.
The Bottom Line
Tongue posture is a real factor in oral health and orthodontic stability — but it is not a DIY substitute for professional orthodontic treatment. The viral "mewing" trend oversimplifies a complex biological system and promises results it cannot deliver. In some cases, it can cause harm.
If you are unhappy with your smile or jawline, the most effective step you can take is to consult a qualified orthodontist. They can evaluate your specific situation, explain your options, and develop a treatment plan based on evidence — not TikTok trends. Legitimate treatments like braces, clear aligners, and myofunctional therapy have the research and clinical experience behind them to deliver results that actually last.
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<!-- Meta Description: Does tongue posture really straighten teeth? The viral "mewing" trend claims it can. We examine the scientific evidence, the real risks, and what orthodontists actually recommend for lasting results. -->
<p><span style="font-size:1.15em; font-weight:700;">The short answer:</span> No. Current scientific evidence does <strong>not</strong> support the claim that consciously changing your tongue posture can reliably straighten crooked teeth or reshape your jawline. The viral trend known as "mewing" has been publicly warned against by the American Association of Orthodontists (AAO), which states there is "no scientific evidence to support its claims of reshaping the jawline, and the potential risks outweigh any unproven benefits."</p>
<p>That said, the relationship between your tongue and your dental arch is real and clinically relevant. The issue is not whether tongue posture matters at all — it is whether <em>deliberately forcing</em> your tongue into a specific position can substitute for orthodontic treatment. This article breaks down what the research actually shows, where the viral claims go wrong, and what legitimate therapy looks like when tongue posture <em>does</em> play a role.</p>
<h2 style="font-size:28px; line-height:1.3; margin-top:32px; margin-bottom:16px;">What Is "Mewing" and Where Did It Come From?</h2>
<p>Mewing is a technique popularized online that involves intentionally positioning the tongue flat against the roof of the mouth, with the back of the tongue resting on the palate and the tip just behind the front teeth. Proponents claim that maintaining this position consistently can:</p>
<ul>
<li>Sharpen the jawline</li>
<li>Widen the upper jaw</li>
<li>Straighten crooked teeth</li>
<li>Improve facial symmetry</li>
<li>Prevent the need for braces or aligners</li>
</ul>
<p>The technique is named after John Mew, a British orthodontist who promoted a practice called "orthotropics." Mew lost his license due to unsupported claims, and his son, Mike Mew, was later struck off the dental register by the General Dental Council for malpractice. Despite this, the trend exploded on TikTok, YouTube, and other social platforms, particularly within "looksmaxxing" communities seeking quick facial improvements.</p>
<h2 style="font-size:28px; line-height:1.3; margin-top:32px; margin-bottom:16px;">The Scientific Evidence: What the Research Actually Shows</h2>
<p>The core problem with mewing claims is that they confuse a <strong>correlation</strong> with a <strong>causal treatment</strong>.</p>
<p>Studies do show that tongue posture is associated with dental arch development. For example, a 2025 study in <em>Cureus</em> found that Class II malocclusion patients exhibited lower tongue posture, increased tongue length, and deeper palatal vaults, which "may contribute to maxillary constriction and malocclusion." Another study from 2019 found a "moderate to weak correlation between tongue posture and dental arch widths."</p>
<p>But here is the critical distinction: <strong>these studies describe the tongue as one factor among many</strong> in a complex system that includes genetics, bone growth, muscle development, and overall craniofacial structure. They do not demonstrate that consciously repositioning your tongue can <em>reverse</em> an existing malocclusion or move teeth into a straighter position.</p>
<p>The AAO is direct on this point: "Facial restructuring is not simply achievable by changing your tongue's resting position. It's a complex process that involves moving jaw bones, facial bones, and soft tissue." Orthodontic appliances like braces and aligners use "gentle, consistent pressure to shift teeth and influence jaw position" according to specific biological principles — not random muscular force.</p>
<h3 style="font-size:23px; line-height:1.35; margin-top:25px; margin-bottom:12px;">Why Before-and-After Photos Are Misleading</h3>
<p>One of the most persuasive elements of the mewing trend is the proliferation of dramatic before-and-after photos. These are notoriously unreliable. A person's face can look significantly different in two photographs due to changes in lighting, camera angle, head position, facial expression, weight, age, facial hair, or even the camera lens and distance used.</p>
<p>No photograph can prove that tongue posture caused a change. It can only show that <em>something</em> changed — and in most cases, that something has nothing to do with the tongue.</p>
<h2 style="font-size:28px; line-height:1.3; margin-top:32px; margin-bottom:16px;">The Real Risks of DIY Mewing</h2>
<p>Forcing your tongue into an unnatural position for extended periods is not a neutral activity. The tongue is one of the strongest muscles in the body, and improper pressure can cause real harm. The AAO warns of several specific risks:</p>
<ul>
<li><strong>Tooth misalignment:</strong> Chronic pressure from mewing can loosen teeth, misalign the bite, and contribute to tooth wear and tear.</li>
<li><strong>Speech impediments:</strong> Altered tongue placement can affect speech patterns and clarity, causing slurring or pronunciation difficulties.</li>
<li><strong>TMJ problems:</strong> Ironically, mewing can worsen jaw tension and temporomandibular joint (TMJ) disorders by encouraging clenching and unnatural muscle activation.</li>
<li><strong>Worsened crowding:</strong> Mewing can actually make teeth <em>more</em> crooked, not less, especially in children and teenagers whose dental structures are still developing.</li>
</ul>
<p>The AAO has documented cases of people who ended up with crooked teeth, trouble chewing or speaking, and other oral health issues as a direct result of attempting mewing.</p>
<h2 style="font-size:28px; line-height:1.3; margin-top:32px; margin-bottom:16px;">The Legitimate Side: Myofunctional Therapy vs. DIY Mewing</h2>
<p>This is where the conversation becomes more nuanced. There <em>is</em> a legitimate clinical field called <strong>orofacial myofunctional therapy (OMT)</strong> that addresses tongue posture and oral muscle function. But it is fundamentally different from the DIY mewing trend.</p>
<table style="width:100%; border-collapse:collapse; margin:20px 0;">
<tr style="background-color:#f5f5f5;">
<th style="padding:12px; border:1px solid #ddd; text-align:left; font-size:16px;">Aspect</th>
<th style="padding:12px; border:1px solid #ddd; text-align:left; font-size:16px;">DIY Mewing</th>
<th style="padding:12px; border:1px solid #ddd; text-align:left; font-size:16px;">Myofunctional Therapy (OMT)</th>
</tr>
<tr>
<td style="padding:12px; border:1px solid #ddd;"><strong>Who performs it</strong></td>
<td style="padding:12px; border:1px solid #ddd;">Self-directed, based on online videos</td>
<td style="padding:12px; border:1px solid #ddd;">Trained therapist or orthodontist</td>
</tr>
<tr>
<td style="padding:12px; border:1px solid #ddd;"><strong>Purpose</strong></td>
<td style="padding:12px; border:1px solid #ddd;">Reshape jaw, straighten teeth (unproven)</td>
<td style="padding:12px; border:1px solid #ddd;">Correct dysfunctional oral habits (tongue thrust, mouth breathing)</td>
</tr>
<tr>
<td style="padding:12px; border:1px solid #ddd;"><strong>Evidence base</strong></td>
<td style="padding:12px; border:1px solid #ddd;">None for teeth straightening or jaw reshaping</td>
<td style="padding:12px; border:1px solid #ddd;">Evidence supports use as adjunct to orthodontics</td>
</tr>
<tr>
<td style="padding:12px; border:1px solid #ddd;"><strong>Primary goal</strong></td>
<td style="padding:12px; border:1px solid #ddd;">Cosmetic change</td>
<td style="padding:12px; border:1px solid #ddd;">Functional stability and relapse prevention</td>
</tr>
</table>
<p>Myofunctional therapy is used to retrain the oral muscles when there are dysfunctional patterns like tongue thrust (where the tongue pushes forward against the teeth during swallowing) or chronic mouth breathing. In these cases, the therapy aims to establish a <em>natural, healthy resting posture</em> — not to force the tongue into an exaggerated position for cosmetic purposes.</p>
<p>A 2025 prospective study published in the <em>Journal of Pharmacy and Bioallied Sciences</em> found that tongue posture training <strong>significantly enhanced the posttreatment stability</strong> of orthodontic correction in Class II malocclusion patients. Patients who received tongue posture training alongside fixed orthodontic treatment had lower relapse rates at 12 months compared to those who received orthodontic treatment alone (mean PAR score change of 1.8 vs. 3.9).</p>
<p><span style="font-size:1.15em; font-weight:700;">Key distinction:</span> This study did not show that tongue posture training <em>straightened</em> teeth on its own. It showed that proper tongue function helped <em>keep</em> teeth straight after they were moved by orthodontic appliances. That is a fundamentally different claim from what mewing proponents make.</p>
<h2 style="font-size:28px; line-height:1.3; margin-top:32px; margin-bottom:16px;">When Tongue Posture Actually Matters</h2>
<p>Tongue posture is clinically relevant in several specific scenarios:</p>
<ul>
<li><strong>Post-orthodontic retention:</strong> After braces or aligners are removed, the tongue can exert forces that contribute to relapse if oral function is not balanced. This is where OMT has demonstrated value.</li>
<li><strong>Anterior open bite:</strong> In cases where tongue thrust contributes to an open bite (where front teeth don't meet), myofunctional therapy is sometimes prescribed alongside orthodontic treatment to address the underlying habit.</li>
<li><strong>Pediatric craniofacial development:</strong> In growing children, chronic oral habits like mouth breathing or tongue thrust can influence dental arch development. Early intervention may be appropriate in select cases.</li>
</ul>
<p>In each of these scenarios, the goal is not to "mew" — it is to restore <em>normal, functional</em> oral posture and eliminate harmful habits. The distinction matters because mewing encourages <em>forced</em> tongue positioning, while OMT focuses on <em>habit correction</em>.</p>
<h2 style="font-size:28px; line-height:1.3; margin-top:32px; margin-bottom:16px;">What Should You Do If You Want Straighter Teeth?</h2>
<p>If your goal is actually straight teeth — not just the appearance of a sharper jawline in selfies — the path is well-established and evidence-based:</p>
<ol>
<li><strong>Get an orthodontic evaluation.</strong> A qualified orthodontist can assess your bite, crowding, spacing, and jaw relationship, and recommend a treatment plan tailored to your specific situation.</li>
<li><strong>Consider traditional braces or clear aligners.</strong> These use controlled, continuous forces to move teeth into planned positions. They work because they follow biological principles, not because they apply random pressure.</li>
<li><strong>Ask about myofunctional therapy if appropriate.</strong> If you have tongue thrust, mouth breathing, or other oral habits that could compromise treatment stability, OMT may be recommended as an adjunct.</li>
<li><strong>Be skeptical of social media "hacks."</strong> The AAO advises against relying on unproven online trends for altering facial features. As AAO President Myron Guymon stated: "Social media is a powerful tool for informing the public, but it is not regulated by experts."</li>
</ol>
<h2 style="font-size:28px; line-height:1.3; margin-top:32px; margin-bottom:16px;">Frequently Asked Questions</h2>
<h3 style="font-size:23px; line-height:1.35; margin-top:25px; margin-bottom:12px;">Can mewing straighten teeth if I do it consistently for years?</h3>
<p>No credible evidence supports this. Teeth move in response to sustained, controlled forces applied by orthodontic appliances — not by general muscular pressure from the tongue. In fact, improper tongue pressure can worsen crowding and misalignment.</p>
<h3 style="font-size:23px; line-height:1.35; margin-top:25px; margin-bottom:12px;">Is proper tongue posture important at all?</h3>
<p>Yes, but the goal is <em>normal</em> resting posture, not forced positioning. The tongue should rest naturally against the palate without excessive pressure. Proper oral posture supports healthy oral function and can contribute to post-orthodontic stability when combined with professional treatment.</p>
<h3 style="font-size:23px; line-height:1.35; margin-top:25px; margin-bottom:12px;">Can mewing work for children or teenagers?</h3>
<p>There is no evidence that mewing can straighten teeth or reshape the jaw in any age group. In children and teenagers, forcing the tongue into unnatural positions may actually <em>worsen</em> dental alignment because their oral structures are still developing.</p>
<h3 style="font-size:23px; line-height:1.35; margin-top:25px; margin-bottom:12px;">What is the difference between mewing and myofunctional therapy?</h3>
<p>Mewing is a self-directed cosmetic practice with no scientific backing for its teeth-straightening or jaw-reshaping claims. Myofunctional therapy is a clinical intervention performed by trained professionals to correct dysfunctional oral habits and support orthodontic stability. They are not the same thing.</p>
<h3 style="font-size:23px; line-height:1.35; margin-top:25px; margin-bottom:12px;">Are there any benefits to mewing at all?</h3>
<p>The AAO states there is "no current research that suggests the technique provides any benefit to your jawline or oral health." Some people may experience temporary changes in facial appearance due to muscle tension, but this is not the same as structural change and may come with risks like TMJ pain and speech difficulties.</p>
<h2 style="font-size:28px; line-height:1.3; margin-top:32px; margin-bottom:16px;">The Bottom Line</h2>
<p>Tongue posture is a real factor in oral health and orthodontic stability — but it is not a DIY substitute for professional orthodontic treatment. The viral "mewing" trend oversimplifies a complex biological system and promises results it cannot deliver. In some cases, it can cause harm.</p>
<p>If you are unhappy with your smile or jawline, the most effective step you can take is to consult a qualified orthodontist. They can evaluate your specific situation, explain your options, and develop a treatment plan based on evidence — not TikTok trends. Legitimate treatments like braces, clear aligners, and myofunctional therapy have the research and clinical experience behind them to deliver results that actually last.</p>
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