I'm 24, but my mom's family all has that dreaded prejowl sulcus look. It's not very pronounced when my face is neutral, but I hate my smile. My chin looks protruding but the rest of my jaw looks round and fat. I already get Botox in my jaw (for bruxism), so I'm not sure if I need to/can reduce the roundness more, or if I should fill in the prejowl sulcus. Or maybe a combination? What can I do to improve this?