Portrait® skin regeneration, "PSR" is a technique for resurfacing and rejuvenating skin. Unlike lasers which use light energy to target a specific component of the skin such as water, hemoglobin, or pigment, this device uses pulses of ionized inert nitrogen gas to alter structures below the surface of the skin, creating unique conditions for continuing regeneration and improvement in wrinkles, acne scarring, skin texture, tone, and discoloration. This technique preserves the skin's outer layers, which act as a protective "biological dressing" until new skin regenerates. Working below the surface of the skin, PSR creates the right conditions and natural growth factors for generating new skin and creating new collagen for continuous improvement in wrinkles, acne scars, skin tone and texture. Portrait® skin regeneration is FDA approved for all of these purposes. Clinical studies show continued improvements for as long as a year after treatment. It has a relatively poor rating of patient satisfaction on RealSelf only 25% to date approved !