At first, I didn't understand how the hell did my left cheek got bigger and more fuller than my left
Then I concluded, because my bite was shifted to the left, much of the jaw activities were concentrated on the left. And when I meant jaw activities, smiling, eating, talking, grinning, pouting, you name it
It's very hard to be conscious about this because we don't really know what's going on with our face when we're not looking at it!
I came across to this site and there were reviews about cosmetic cheek implants. The negative reviews mostly said that it sagged, didn't match with the other right cheek, vanished 6 months-a year later
It makes sense because unlike for example a thigh when you do cosmetic surgery on a thigh, it lasts for years because it a thigh doesn't move as much as our faces where we constantly move through facial expression.
I think our asymmetrical cheek is due to the lack of muscle volume in one cheek compared to the other cheek because much of the jaw activity was concentrated on one side.
How am I dealing with? I did some research on how to do cheek muscles. I must be honest, I haven't done them daily at all -just when I remember them. So I can't really say whether they work or not. I'm also sleeping on the side where I don't have much muscle volume... I thought it might help because I actually had been sleeping on the other side where there was more volume

But maybe these will help you:
http://www.youtube.com/watch?v=7WOI1Ce5L4A
http://www.youtube.com/watch?v=GhCO5iN0V7Y
Be careful if you copy some exercises on other videos that might actually cause more creases/wrinkles
p.s. I actually have not developed the muscles that make my smile reach my ears as far as possible like it can only reach as much. Idk if this is biological. My smile parentheses are asymmetrical but I'm counting on my braces for that