Sharpie does not endorse the use of their pens on the skin for body art such as touching up permanent tattoos, creating temporary tattoos, lip liner, or eyeliner. While some Sharpies are non-toxic, others contain neurotoxins that can have harmful effects on your organs. To be safe, avoid using Sharpies on your face or anywhere on your body. Perhaps consider using a specialized option such as a tattoo marker or body art pen.