The hospital said that the jaw muscle was great hahaha I was right because I was told that I would see a lot of Botox effect. I had a lot of jaw muscles, so it worked really well. If you feel the convex protruding part of your chin when you close your mouth, you have a lot of muscle! When I go to the hospital, they see if my face can be botoxed. My friend got a fat dissolving injection..because botox wouldn't work hehe