Does Mewing Work for Adults? What’s Real and What’s Not

For general education only, not medical or dental advice. Please read the full disclaimer at the end of this article.

“Mewing” has gone from an obscure orthodontic concept to a TikTok phenomenon over the past few years. Searches for “does mewing work” run over 100,000 per month, and the content ranges from reasonable explainers to dramatic before-and-after claims that have prompted the American Association of Orthodontists to issue an explicit warning.

This post separates what’s real from what’s hype, and addresses the most common questions adults ask when they’re trying to decide whether mewing is worth their time.

What is mewing, exactly?

The technique is named after Dr. Mike Mew, a British orthodontist who popularized the concept on social media. The instruction is simple: keep your tongue pressed flat against the roof of your mouth, lips together, teeth slightly apart, all day every day. The claim from popular content is that sustained tongue-to-palate pressure can reshape adult facial structure — sharper jawline, higher cheekbones, more defined chin — over weeks or months of practice.

The technique itself overlaps almost entirely with proper resting tongue posture as understood in airway-focused dentistry and orthodontic literature for decades. Tongue should rest on the palate, lips should seal, breathing should be nasal. We cover the fundamentals in our tongue posture adult guide.

Where mewing-as-internet-trend diverges from the supported clinical concept is in the dramatic-transformation claims and the recommendation to do this without professional evaluation.

What’s actually supported by evidence

The supported version of this concept:

• In growing children (roughly under age 15), proper tongue posture has documented effects on jaw and palate development. This is well-established in orthodontic and myofunctional literature. Growth-window interventions can meaningfully shape arch width, jaw alignment, and airway dimensions.
• In adults, sustained proper tongue posture supports breathing, jaw position, and (long-term, over years) some maxillary support. The evidence for dramatic adult facial restructuring is weak. Subtle improvement in jaw position, posture, and possibly cosmetic perception is realistic. Significant bone remodeling is not.
• Functional benefits in adults — improved nasal breathing, reduced jaw tension, better sleep quality (when paired with broader airway work), reduced anterior tongue thrust patterns — are realistic and reasonably supported.

What’s NOT supported (the AAO warning)

The American Association of Orthodontists has issued a public statement cautioning against unsupervised mewing — specifically calling out social media content that promises dramatic adult facial transformation. The concerns flagged include:

• Improper technique can reinforce the wrong pattern, including anterior tongue thrust against the front teeth — which can actually worsen bite issues and orthodontic stability.
• Unrealistic expectations set up patients for disappointment and can mask underlying conditions that need actual evaluation (tongue tie, narrow palate, sleep-disordered breathing).
• “Hard mewing” — the practice of pressing very hard with the tongue, common in TikTok content — is not the same as proper resting posture, can cause TMJ symptoms, and isn’t supported by literature.
• Bypassing professional evaluation means missing structural issues that require actual treatment (tongue tie, malocclusion, airway issues that need orthodontic or surgical management).

Realistic expectations for adults

What we tell adult patients who ask about mewing:

Realistic outcomes (with consistent, properly-executed posture work over months-to-years):

• Better nasal breathing and reduced mouth-breathing
• Less daytime jaw tension
• Improvement in resting tongue position over 6-12 months of work
• Some improvement in posture and head position
• Subtle, gradual definition along the jaw — sometimes

Unrealistic outcomes:

• Dramatic jaw structure change in weeks
• Significant cheekbone or chin restructuring in adulthood
• Resolution of underlying conditions like tongue tie, narrow palate, or sleep apnea through posture alone
• Permanent transformation without ongoing maintenance

Why “just doing it” often doesn’t work

The most common failure pattern we see in adults who try mewing on their own:

1. The tongue can’t physically reach the palate due to a tongue tie. The patient pushes the tip up but the back of the tongue stays down. This isn’t proper posture — it’s effortful approximation, and it can’t be sustained. The structural restriction needs to be evaluated; some patients are candidates for adult frenectomy.
2. The palate is too narrow to accommodate the full width of the tongue. The tongue defaults to floor-of-mouth posture because there’s literally no surface to rest on. Functional orthodontics can address this in adults — Dr. Erica went through arch expansion herself.
3. The orofacial muscles aren’t conditioned to hold the position. Sustained proper posture requires muscle tone that has to be built. Myofunctional therapy is the structured way to do that — exercise progressions over months, with feedback from a trained therapist.
4. Improper technique reinforces the wrong pattern. Without external feedback, many self-taught mewing practitioners actually push the tongue forward against the teeth (anterior tongue thrust) rather than up. Over time this can worsen orthodontic stability.

The supported approach for adults who want to work on this

The path that actually works for most adults, based on what we see clinically:

1. Get evaluated. Find out whether tongue tie, palate width, jaw position, or breathing pattern are part of the picture. This determines what’s reasonable to try.
2. Address structural restrictions first. If there’s a tongue tie, no amount of posture work will give you full mobility. If the palate is too narrow, you need width before you need posture training.
3. Work with a myofunctional therapist. Structured retraining over 6-12 months, with feedback. We refer out to specialists rather than performing myo in-house — see our myofunctional therapy page.
4. Pair with sleep and breathing work. Tongue posture is one piece of the airway puzzle. If snoring or sleep-disordered breathing is part of the picture, that warrants its own evaluation — see our sleep apnea services.
5. Have realistic expectations. Functional improvement is reachable. Dramatic facial transformation is not.

Frequently asked questions

Does mewing actually work for adults?

The functional benefits — better tongue posture, improved nasal breathing, reduced jaw tension — are real and reachable for many adults with proper guidance. The dramatic facial transformation claims circulating online aren’t well-supported by evidence in adults.

How long do I need to mew to see results?

Functional improvements (breathing, jaw tension, swallow pattern) often show up in 3-6 months with consistent practice and proper technique. Subtle structural changes happen over years, if at all. If you’re not seeing functional improvement in 6 months of consistent work, the issue is usually technique, an unaddressed structural restriction, or both.

Is hard mewing dangerous?

It can be. The “hard mewing” pattern popular on TikTok — pressing the tongue forcefully against the palate for hours — isn’t the same as proper resting posture, and it’s been associated with TMJ symptoms and orthodontic instability. Proper tongue posture is gentle, sustained contact, not forceful pressure.

What did the AAO actually say in their warning?

The American Association of Orthodontists cautioned the public against unsupervised mewing — particularly social media claims of dramatic adult facial transformation — and recommended professional evaluation before attempting orthodontic-adjacent self-treatment. They didn’t dismiss tongue posture as a clinical concept; they pushed back on the unsupported claims and the bypass-the-professional culture around it.

Should I see a dentist or an orthodontist for tongue posture?

An airway-focused dentist or orthodontist trained in myofunctional principles is the right starting point. Most general dentists and conventional orthodontists don’t evaluate tongue function in depth. Our practice focuses on the airway-and-tongue-function lens specifically.

Where to start

If you’ve been considering mewing and want to know whether tongue posture is a workable lever in your case (and what’s underneath it), an evaluation will give you the answer. Schedule a consultation or call (708) 460-6699.