Does “Mewing” Actually Work?

No. There is no credible scientific evidence that mewing reshapes your jawline or facial bones, especially in adults. The American Association of Orthodontists is direct about it: “there's no current research that suggests the technique provides any benefit to your jawline or oral health” (American Association of Orthodontists). Proper tongue posture and nasal breathing genuinely matter for healthy development in growing children. That is a different thing from the viral promise that pushing your tongue against the roof of your mouth will give an adult a sharper jaw.

What mewing claims vs. what's proven

Mewing, named after a British orthodontist whose dental license was later revoked, claims that holding your tongue against the roof of your mouth will sculpt your jawline, straighten teeth, and remodel your face. The evidence does not support it.

The AAO puts it plainly: the organization “does not recommend any attempts to move teeth or align jaws without appropriate supervision, as they likely won't achieve the results you're aiming for” (American Association of Orthodontists). Dramatic before-and-after photos online are not clinical evidence.

Where the kernel of truth is

Here is the part worth keeping: tongue posture and nasal breathing do matter, in children who are still growing. Where the tongue rests and whether a child breathes through the nose are part of how the upper jaw develops. That is exactly why orthodontists evaluate these things in kids. The leap that does not hold is applying it to an adult whose facial bones are already mature.

Dr. Kim's view from the chair: mewing can tone the muscles around the mouth and neck, while changing the bone structure is not really significant at adult age.

Why DIY is risky

Trying to force teeth or jaws to move without supervision can backfire. Pushing on teeth with the tongue can strain the jaw joint, irritate the bite, and in some cases make alignment worse, turning a small issue into a longer, more expensive one. The AAO's caution against unsupervised attempts exists for a reason.

What actually helps

If you are an adult who wants a different jawline or straighter teeth, the honest path is a real evaluation and proven treatment: braces, aligners, and, for skeletal concerns, options an orthodontist or surgeon can discuss. If you are a parent who noticed your child has a tongue-thrust or airway habit, that is treatable, with professional guidance, not a social-media routine.

The honest bottom line

Good tongue posture and nasal breathing are healthy habits, especially for kids. Mewing as a way to reshape an adult face is not supported by science. The most useful thing you can do is have a professional tell you what is actually going on: a screening, not a guess.

Common related questions

Does mewing work for adults?

No. Adult facial bones are mature, and there is no credible evidence that tongue posture reshapes them. The American Association of Orthodontists says there is no current research showing a benefit to your jawline.

Can mewing fix my child's teeth?

Tongue posture and nasal breathing do matter during a child's growth, but mewing is not a substitute for an evaluation. If there is a tongue or airway habit affecting the bite, an orthodontist can address it safely.

Is mewing dangerous?

For most people the risk is low, but pushing on teeth or the jaw without supervision can cause jaw-joint strain or worsen a bite. The AAO advises against attempts to move teeth or align jaws without professional supervision.

What should I do instead?

Get a real evaluation. An orthodontist can tell you what is achievable for your teeth, bite, and, in children, jaw growth, and recommend treatment that is actually proven.