ð Mewing: What the Claims Say vs What the Evidence Supports
Updated September 2026
Straight answer: Resting your whole tongue on the roof of your mouth, lips closed, breathing through your nose, is good oral posture and it does tighten the muscles under your chin while you hold it. That is why mewing photos change in ten seconds. The big claim, that adults can reshape their jaw and cheekbones with tongue pressure, has no controlled trial behind it and runs against how adult facial bone behaves. Keep the posture, skip the forcing, and don't expect a new skeleton.
Where mewing came from, and what it promises
The name comes from John Mew and his son Mike Mew, British orthodontists behind "orthotropics", an approach built on the idea that tongue and jaw posture guide how a face grows. Mainstream orthodontics has never adopted it. Around 2019 the idea escaped into YouTube and Reddit, and a few years later TikTok turned it into a meme complete with a shushing finger along the jaw.
The online version promises a lot. A sharper jawline, higher cheekbones, a stronger chin, sometimes a straighter nose and better breathing. Timelines float between six months and "a few years", which is conveniently long enough that nobody can check.
Some of that is reasonable. Most of it is not. The trick is separating the two, because the reasonable part is worth keeping.
Why the before and after works in ten seconds
Try it now. Close your lips, let your back teeth rest lightly together or just apart, and press the whole tongue, back third included, flat against the roof of your mouth. Feel the area under your chin firm up? That's the suprahyoid group, mylohyoid and friends, contracting to hold the tongue up. The floor of the mouth lifts, the soft tissue under the jaw tightens, and the chin-to-neck angle gets crisper.
Now take a photo. Then relax your tongue and take another. You just made a mewing transformation post, no bone involved.
Most viral results stack this with the usual suspects: head pulled back over the shoulders, a slightly lower camera, better light, a few pounds of weight loss. Say someone mews for six months and drops seven pounds in the same stretch. Faces often show fat loss early, and seven pounds can be the difference between a soft jawline and a visible one. The post will credit the tongue.
The bone claim, checked against how adult faces work
In children the story is more interesting, and it's where the Mews' ideas actually came from. Growing faces respond to habitual forces. Kids who mouth-breathe for years, often because of big adenoids or allergies, tend toward longer faces and narrower upper jaws, and tongue-thrust habits can push teeth into an open bite. That's why orthodontists and myofunctional therapists do pay attention to tongue posture and nasal breathing in young patients.
Adults are different. Once growth is done, widening an upper jaw usually takes an appliance anchored to bone, often with surgical help, because the seam down the middle of the palate has stiffened or fused. If a device pushing continuously on the palate for months needs surgical backup, a tongue resting against it is not going to lift your cheekbones. The tongue can nudge teeth over time, which is exactly why tongue thrust matters. Moving teeth is not moving the skeleton.
There is no randomized trial showing adult mewing changes bone. There are forum threads and photo pairs, which have all the problems from the section above. Until someone runs the study, the honest position is: plausible in kids under professional care, unsupported in adults.
Keep this, skip that
Keep the posture. Tongue up, lips together, nose breathing, teeth not clenched. It's the resting position most clinicians already describe as normal, it gently trains the under-chin muscles, and it pairs naturally with fixing forward head posture, which does more for a profile photo than any single exercise. Our Tongue Press and Chin Scoops moves work the same muscles on purpose, a few minutes a day, with a start and an end.
Skip hard mewing. Jamming the tongue up with force for hours, or clenching the back teeth to "hold" it, is how people end up with sore jaw joints, headaches and a new clenching habit. If your jaw clicks, locks or aches, stop and let it settle. Anyone with a TMJ history should keep it to relaxed resting posture only.
Get a professional involved if a child snores, mouth-breathes most of the day or has a tongue that pushes forward when swallowing. That's a dentist, orthodontist or ENT conversation, and early is better. Same goes for adults who snore heavily or wake exhausted, since that points toward sleep breathing, not jawline aesthetics.
FAQ
Does mewing actually change your jawline?+
It changes how the jawline looks while you're doing it, because lifting the tongue tightens the muscles under the chin. There's no controlled evidence that it remodels adult bone. Most lasting before-and-after changes come from posture, weight loss or camera angle.
Is mewing bad for you?+
Gentle mewing, meaning ordinary tongue-up resting posture with relaxed teeth, is harmless and generally considered healthy. Forcing it hard for hours or clenching to hold it can aggravate jaw joints and cause headaches.
Can mewing help a double chin?+
It helps the muscle-tone and posture parts of a double chin, the same two parts that chin exercises target. It does nothing for the fat pad itself, which follows your overall body composition.