My entire life, I've been really unhappy with my submandibular glands beneath my throat! I'm very thin, i've done jaw, jawline, under neck b*tox- basically EVERYTHING but I still have huge swelling beneath my jawline!

I'm looking to do this surgery, but i am a little confused. 

I don't know what the difference is between the neck lift, and muscle tightening. 

I am having a consult in Feb, and I really hope to find out more especially with the ultrasound!