Derma Roller is a skin needling device, the cylinder is covered in tons of little needles that individually prick the surface of the skin, creating what are known as 'micro-injuries'. After micro-injuries are created, your skin has ro work extra hard to repair the broken cells, which in turn accelerates the production of collagen and elastin.
Benefits are: reducing signs of fine lines, improving pigmentation and scarring. plumps and smoothes the skin, making your products go deeping into your skin and your makeup even.