www.drgerrish.com. The Thermage® procedure is a revolutionary treatment to tighten skin without surgery or recovery time. Utilizing radio-frequency technology, the ThermaCool TC system delivers heat to the skin's lower layers resulting in the gradual tightening and building of the collagen structure. With over 200,000 treatments performed in the United States and Canada, patients now have another proven modality to combat the signs of skin laxity.