A sharp blade tool—not unlike a scalpel—is used to scrape off the top layer of the skin (and its accompanying hair), says Stalina Glot, an aesthetician at Haven Spa in New York City. Arash Akhavan, MD, a board-certified dermatologist in New York City, previously told Allure that even though you won't be piercing the skin, it's still essential to ensure your face is squeaky clean, as not to introduce germs into just-exfoliated, possibly vulnerable skin. However, according to Dr. Gohara, hair may initially seem coarser when it grows back because it has that stubbly skin feeling as it peaks out of your hair follicle.