Derma rollers come in different needle lengths depending on the targeted area.This particular derma roller is specifically for stretch Mark's. Derma diminishes the appearance of stretch Mark's by smoothing them out and activating new cells . Stretch mark are caused by a build up of dead skin cells . Derma penetrates the skin which causes new cells to form . Will need to be used in treatments no more than 2xs a month due to its effects over use will cause damaged skin and scarring .. feel free to google the derma roller to see how this product may benefit and suit your needs .
