Plasma pen skin tightening is a noninvasive treatment that revitalizes your skin. The plasma pen passes energy through inert nitrogen gas, which when activated, is called plasma. The plasma radiates thermal energy in the form of an electrical arc, which eliminates oxygen from the tissue. It also simultaneously delivers uniform heat to your skin. Essentially, the plasma pen evaporates excess skin, causing it to contract and eliminate any wrinkles and sagging. The pen can also improve the appearance of acne scars, sun-aged skin, hyperpigmentation, and keratosis.