SkinPen skin needling, also commonly referred to as Collagen Induction Therapy (CIT) is a minimally invasive procedure that involves using the needling device to trace over the skin’s surface. Attached to the tip is a disposable and sterile cartridge that contains tiny needles. These needles puncture the skin to create a micro-injury, that is not visible to the naked eye. This process stimulates a wound healing cascade within our skin, to kickstart your collagen, improve texture and tone as well as skin tightening.