Reasons why mewing may not be working for you

[BornAgainChad]

I've studied how mewing works, and it basically operates on the principals of palatal expansion. Palatal expansion is achieved using orthogonal devices, applying force to the upper jaw to expand the palate. Mewing is simply using your tongue instead of using a dental device.

Mewing may not be working because...
-You aren't applying consistent force (constant low force works the best for remodeling bone, so make sure you soft mew ALL DAY)
-Your palate may be far too narrow, in this case just get a palate expanding device and mew later (your tongue can't fit well enough to mew)
-You're jutting your jaw out (this reduces your ability to apply pressure to your upper jaw)

A palatal expander works because it applies consistent force and distributes the force on the upper jaw. If you aren't (or are unable to) doing this when mewing, that is why it is not working for you.

 

[DrTony]

Palatal expansion when real by orthodontic device ALWAYS creates a small gap between the 2 front incisors. Proof that it actually works. If you are mewing and you think your upper jaw expanded or whatever but noticed no visible gap between the 2 front teeth you are simply IMAGINING things or not taken into account confounding factors such as the pronounced facial changes that occur during puberty. Simple as that