Everyone is like this, including hands and feet, but you can't see it. This is normal. If your proportion is really large, you can only rely on plastic surgery.
It's not obvious and don't worry, everyone has a little.
If you can see it, it is usually caused by eating and sleeping.
Chew with the side you usually use less when eating, and sleep in the opposite direction or on your back when sleeping.
Sticking to it for a while will have an effect.