Mewing is one of the most talked-about trends in online looks communities: a tongue posture technique that supporters claim can sharpen the jawline and reshape the face. With "before and after" videos everywhere, it's easy to wonder whether it really works. Here's what mewing is, what the evidence actually shows, and what does make a visible difference.
What is mewing?
Mewing means resting your whole tongue flat against the roof of your mouth (the palate), not just the tip, with your lips closed, teeth lightly touching or slightly apart, and breathing through your nose. It's named after a British orthodontist family whose ideas about oral posture became popular online in the 2010s.
Supporters claim that holding this posture consistently over months or years can:
- define the jawline,
- lift the chin and reduce the look of a double chin,
- improve facial "harmony."
Does mewing work?
There is no strong scientific evidence that mewing changes the facial bones of adults. The main points:
- Adult bones are mature. Facial growth largely finishes in the late teens to early twenties, so posture alone is unlikely to reshape adult bone.
- The "proof" is mostly photos. Many before-and-after images differ in camera angle, lighting, head tilt, weight loss or simply holding the posture while the photo is taken.
- Tongue posture does matter in some contexts. Orthodontists and myofunctional therapists do work on tongue posture and nasal breathing, especially in children, but as part of supervised treatment, not as a cosmetic shortcut.
- Holding the posture can make the jaw look sharper in the moment, because pressing the tongue up tightens the area under the chin. That's a posture effect, not a structural change.
Possible downsides
- Jaw pain or TMJ discomfort from clenching or pushing too hard.
- Tooth problems if you press your teeth together constantly.
- Disappointment and anxiety from chasing changes that aren't realistic.
If you have jaw pain, bite problems or breathing difficulties, talk to a dentist, orthodontist or doctor.
What actually improves how your jawline looks
These make a real, visible difference, especially in photos:
- Posture: stand and sit tall with your head over your shoulders, not jutting forward. "Tech neck" softens the jaw-neck angle.
- Camera angle: a slightly higher camera, chin slightly forward and down, defines the jawline instantly.
- Body fat: the jawline becomes more visible with a lower body fat percentage; healthy diet and exercise help.
- Less bloating: sleep, hydration, and less salt and alcohol reduce facial puffiness.
- Facial hair: a short boxed beard or heavy stubble can create a sharper jaw line. See beard styles by face shape.
- Haircut: short sides and some height on top make the lower face look more defined. Preview options with the hairstyle try-on.
- Contour (for those who wear makeup): soft shading under the jawline adds definition.
More ideas in our guide to the jawline.
Mewing for teens and kids
Because facial growth is still happening, some specialists believe oral posture can influence development in children. That's a question for an orthodontist, who can assess bite, breathing and growth properly, rather than something to copy from videos.
FAQ
What is mewing?
Mewing is resting the whole tongue flat against the roof of the mouth, with lips closed and breathing through the nose, with the goal of improving facial appearance.
Does mewing really work?
There's no strong scientific evidence that mewing changes the face of adults. It can make the jaw look sharper while you hold the posture.
How long does mewing take to show results?
Claims range from months to years, but there's no reliable evidence of structural results in adults.
Is mewing safe?
Gentle correct tongue posture is generally harmless, but pushing hard or clenching can cause jaw pain or dental problems.
What's a better way to get a defined jawline?
Good posture, flattering camera angles, healthy body fat levels, less puffiness, a well-groomed beard and a suitable haircut.
