If done properly and with a FDA approved device you will not get fat melting. I do think you need more than just ultherapy though for tightening. I suggest you see an expert for treatment. Ultherapy is a great option though. Best, Dr. Emer.
Given that you have had surgical results ( more than once), I don't think you would ever be satisfied with a nonsurgical result ( such as Ultherapy). Ultherapy is an effective non surgical technique but generally for younger patients.
The collagen stimulation sounds nice but its insult or injury caused by an energy source, in this case ultrasound, which results in scarring or collagen production by the fibroblasts that come to the injury site to begin repair. If you expose the area to energy again, you will cause damage like...