Radiofrequency (RF) therapy, also called radiofrequency skin tightening, is a nonsurgical method of tightening your skin.
The procedure involves using energy waves to heat the deep layer of your skin known as your dermis. This heat stimulates the production of collagen.
RF therapy has been used since 2001 to fight against sagging skin and signs of aging.
Thermalift was the first type of RF available for skin tightening, but now many companies offer similar technology.
Each type of technology works the same way. RF waves heat the deep layer of your skin to between 122 and 167°F (50–75°C).
Studies have found that maintaining a temperature over 115°F (46°C) for over 3 minutes causes your body to release heat-shock proteins. These proteins stimulate your body to create new collagen fibers.
The procedure normally takes less than an hour and should be nearly painless.