What does a skin tightening treatment feel like? January 24, 2023 During the Renuvion skin tightening treatment, a small needle-like device will be inserted into the skin through a small incision. This incision will be discreetly placed to minimize any visible scarring. Once beneath the skin, the Renuvion J Plasma device begins emitting radiofrequency energy. The device also emits helium gas simultaneously, which combines with the radiofrequency wavelengths to create “plasma”. This combination tightens the skin, while the helium gas helps to cool the skin and keep you comfortable for the duration of treatment. Renuvion is commonly performed with liposuction procedures to increase the overall aesthetic outcomes of liposuction and to improve the ability to sculpt finer results.