Asymmetrical mouth and smile. Is there anything that can be done for this? (Photo)

I have an asymmetrical mouth and smile that has caused me to feel self conscious all my life. I feel self conscious often while talking and especially when laughing, I find myself covering my mouth with my hand to limit showing my smile. When I smile the right side is more "gummy" than the other. In addition to this, it is very bothersome to me that simply sitting expressionless whether it be open or closed mouth, there is an asymmetrical appearance. Is there anything that can be done for this?