It is a popular technique that can help increase jaw strength and cheekbone definition, and thus improve jawline. 

How does it work?

After practicing the first step of the mewing technique, your body will automatically adapt to the changes and the jaw muscles will begin to grow. This is the second step. The third step is where you will have to use your muscle. 

Mewing improves chin shape, cheekbones, and jawline. It helps to decrease the appearance of double chin and it is an effective way to increase jaw and cheekbone strength.