Thermage creates a very limited effect. You should really speak to your doctor. If it’s just skin wrinkling it can help. If it’s excess skin, you really need a tummy tuck or a skin recession. Thermage is best for just creating some tightening. But, Thermage is very variable. It tends to work better in some patients than in other patients.
Web reference: http://www.chelseaeye.com/resurface_cos.htm#Thermage