ABSTRACT
Skin needling is a dermatologic treatment performed to achieve percutaneous collagen induction, which is effective at improving depressed acne scarring. Skin needling creates dermal damage without the removal of the healthy epidermis, which happens with other resurfacing techniques. Percutaneous collagen induction provokes the natural response to wounding of the skin, even though the wound is minute and mainly subcutaneous. The facial skin is disinfected and then a topical anesthetic is applied and left for 60 minutes. There are a number of skin rollers available for professional and home use that come in many different needle lengths, diameters, and numbers, which can make it very confusing for their users. Automatic needling can give a standardized pressure to the whole surface treated with a better effect on collagen and elastin rejuvenation. Since the needles are set in a roller, every needle initially penetrates at an angle and then goes deeper as the roller turns.
