Plasma fibroblast therapy targets fibroblasts. These are collagen– and protein-producing cells in the dermis, the layer of skin just below your outermost skin layer. Fibroblasts play an important role in helping skin wounds heal as well as maintaining skin firmness and tightness. Plasma fibroblast therapy uses a pen-like device that discharges a highfrequency electric current to small areas of the skin. The plasma tip doesn’t directly touch the skin, but instead releases a targeted current just above the skin. The hot current creates small holes, or micro-injuries, in the skin’s layer. According to an 2019 article published in the PMFA journal, the thermal disruption, or heat damage, from plasma fibroblast therapy: