Alright so I recently got my braces off and got those plastic retainers. Is it possible that I could get expansion or facial upswing while wearing these plastic retainers? I've been mewing lately and even with the retainers in I feel tingling in my cheekbones and sutures on my palate cracking. Then again, my retainer isn't fitted very well. Any experiences and advice? Also I noticed mewing is ALOT easier without braces, the braces felt like it gave me slight tension in my tongue due to its heavy forces on the teeth.
I would say mewing with retainers is like trying to run while being chained, but who knows you might have a point with upward expansion and your sensations tell you so then go ahead nothing to loose. Even if you wouldn't expand anything you would still be training your tongue in strenght and technique, good luck