Microneedling, or SkinPen, is a therapy that stimulates collagen growth, thickens and smooths skin, and is excellent for scars caused by trauma or acne. During the procedure the skin is actually poked thousands of time with very tiny needles. The needles are so small they are difficult to see and they barely break the surface of the skin, so it is not as uncomfortable as it sounds. In fact, after a few hours of redness most patients go about their normal lives without anyone noticing the effects of the procedure. Over the next few weeks the skin responds to the stimulation of the needles by creating new collagen.