Unfortunately, Thermage is really not an effective treatment for stretch marks. Stretch marks are difficult to treat. We have had some good results with laser treatments such as Fraxel but it does not eliminate or erase the stretch marks. You may consider consulting with a plastic surgeon to review your options for a possible tummy tuck that may address your stretch marks and loose skin.
Dr. Grant Stevens
Web reference: http://www.marinaplasticsurgery.com