Creators online claim mewing is the easy hack to define your jaw treatment-free. It involves pressing your tongue to the roof of your mouth with your teeth lightly touching and your mouth closed.

It may cause lasting damage to your jaw, facial bones, and soft tissue. The basics of mewing, according to the London School of Facial Orthotropics, involves keeping your mouth closed with your ...

Mewing, a practice advocated by social media ... other facial bones and soft tissue," said John Callahan, president of the American Association of Orthodontists to the Washington Post.

Mewing is the teen trend that's driving parents up the wall. Not only a slang word, mewing is a move. According to the American Association of Orthodontists (AAO), mewing claims to be a “do-it ...