Face problem, asymmetrical face

The other side of my face is fatter or bigger than the other side, should I sleep or lay my head on the bigger side of the face to make it thinner? And if I should sleep on the back, will it fix it? Like if I sleep in my back like both will have progress but will it actually help the uneven side? Like let's put it like this, if both of side is growing in the same time, will the other side will adjust? To even things out?