Mewing is the practice of pressing your tongue flat against the roof of your mouth and holding it there, with the goal of reshaping your jawline and facial structure over time. It’s named after British orthodontists John and Mike Mew, who developed a broader dental philosophy called orthotropics. The technique went viral on social media, where before-and-after photos fuel claims of sharper jawlines, higher cheekbones, and more defined facial features.
Where the Idea Comes From
John Mew, an orthodontist practicing in the UK, proposed that narrow jaws and crowded teeth were primarily a lifestyle problem, not a genetic one. He and his son Mike Mew argued that poor tongue and mouth posture played a major role in how the face develops, similar to how bad sitting posture contributes to back pain. Their field, orthotropics, focuses on guiding facial growth in children through proper tongue posture rather than relying solely on braces or extractions.
Orthotropics as a clinical practice involves more than tongue placement. It sometimes includes appliances that help push the lower jaw forward. Mewing is just the tongue posture component, and it’s the piece that took off online because anyone can try it at home without equipment or a dentist’s involvement.
How the Technique Works
The basic instructions are simple. Close your mouth and relax your jaw. Position your lower front teeth just behind your upper front teeth. Then flatten your entire tongue against the roof of your mouth, with the tip resting just behind (but not touching) your front teeth. Your teeth should lightly touch each other, but you shouldn’t clench. Breathe through your nose.
The key detail that trips people up is getting the back of the tongue pressed against the palate, not just the tip. Most people naturally rest only the front portion of their tongue on the roof of the mouth. Mewing asks you to engage the full surface, which can feel unusual and tiring at first.
Soft Mewing vs. Hard Mewing
Within online mewing communities, two main approaches have emerged. Soft mewing means gently resting the tongue against the palate with light, consistent pressure. This is what most proponents recommend as a starting point and as a long-term habit.
Hard mewing involves pushing the tongue forcefully against the roof of the mouth. Some practitioners believe this is the only way adults can see real structural changes, since their bones are fully developed. However, hard mewing carries more risk. People report jaw pain, ear pain, and joint discomfort from the excessive force. There’s no clinical evidence showing that harder pressure produces better or faster results, and the potential for aggravating the jaw joint makes it the riskier option.
A third variation sometimes discussed is “suction mewing,” where you create a vacuum seal between your tongue and palate. Proponents describe this as a way to maintain tongue position passively without constant muscular effort.
What People Report Experiencing
Online communities are filled with personal accounts from people who’ve practiced mewing for months or years. The most commonly reported changes include a more defined jawline, higher-looking cheekbones, hollower cheeks, and a shorter-appearing face. Some people say they noticed subtle differences within a few months, while others report more significant changes after one to two years of consistent practice.
The experiences vary widely, though. Some people report visible changes after four months of combining mewing with improved overall posture and chewing habits. Others see nothing after a full year. Age plays a role in these accounts: younger practitioners, whose facial bones are still growing, tend to report more dramatic results. Adults more often describe soft tissue changes (like slightly hollower cheeks from altered muscle use) rather than obvious bone restructuring.
It’s worth noting that these reports come with significant caveats. Most are based on selfies taken at different angles, in different lighting, over time periods when natural aging, weight loss, or puberty could easily explain the differences. Without controlled before-and-after imaging, it’s impossible to separate mewing’s effects from everything else that changes a face over months and years.
What the Evidence Actually Supports
The core claim of mewing is that tongue pressure can remodel facial bones, particularly the upper jaw (maxilla). In children and adolescents whose bones are still growing, there’s reasonable biological plausibility here. Orthodontic appliances work on the same principle: sustained pressure over time moves bones and teeth. Orthotropics as a clinical practice does focus on children for this reason, and palatal expanders are a well-established tool in pediatric orthodontics.
For adults, the picture is much less promising. Adult facial bones are fully fused and far more resistant to repositioning through light pressure alone. The American Association of Orthodontists has not endorsed mewing as an effective technique for reshaping the jawline. No peer-reviewed clinical trials have demonstrated that tongue posture alone can produce measurable skeletal changes in adults.
That said, mewing does encourage two things that are broadly beneficial: nasal breathing and good oral posture. Chronic mouth breathing is associated with a range of dental and sleep-related problems, so adopting a closed-mouth, tongue-up resting posture is unlikely to cause harm and aligns with what many dentists and myofunctional therapists already recommend.
Potential Risks
Gentle, soft mewing is generally considered low-risk. You’re essentially adopting what many clinicians describe as a natural resting tongue position. The problems tend to arise when people apply too much force or do it incorrectly.
Hard mewing can strain the temporomandibular joint (the hinge connecting your jaw to your skull), leading to jaw pain, clicking, headaches, and ear discomfort. Applying uneven pressure, or pushing the tongue against the front teeth rather than the palate, can gradually shift teeth out of alignment. People who already have bite issues or jaw joint problems are especially vulnerable to making things worse.
Obsessive focus on facial appearance, particularly among teenagers who make up a large share of the mewing community, is another concern worth mentioning. Spending months scrutinizing jaw angles in a mirror can reinforce unhealthy fixation on features that are still naturally developing.
Realistic Expectations
If you’re an adult hoping mewing will give you a dramatically different jawline, the honest answer is that there’s no scientific evidence it will. The changes adults notice are more likely related to improved muscle tone in the tongue and jaw, slight shifts in soft tissue, or simply better posture making the jaw appear more defined.
For younger people still going through facial development, proper tongue posture could theoretically influence growth patterns, though this is better pursued with professional guidance from an orthodontist or myofunctional therapist rather than through social media tutorials alone.
The most reliably beneficial parts of mewing have nothing to do with aesthetics: keeping your mouth closed at rest, breathing through your nose, and maintaining good head and neck posture. These habits support better sleep, dental health, and overall comfort regardless of whether they change the shape of your face.