Best treatment for removing hamster cheeks / drooping cheeks? (photo)

I have had big hamster cheeks all my life. I'm almost 17 years old and It seems to be getting worse. My body is skinny though. I try facial massages to try and slim down my cheeks but it has made no difference. I can also feel the bottom part of my cheeks are heavy, like I can feel them drooping down. I also have fat around my mouth, below my lower lip and I have deep facial lines on the corners of my mouth which makes me look ugly. What are the best procedures / treatments for this?