The benefit of threading that most sets it apart from other hair removal techniques is its precision. While waxing and plucking can often leave unwanted stray hairs around your eyebrows, a threading artist goes through your hair row by row, giving eyebrows a clean and defined shape. Threading only removes hair, not skin, and because it is so exact, it can remove hairs that are finer than those that can be removed by waxing or plucking.
People on particular medications or with certain skin conditions may turn to threading to remove their hair because it's gentler on the skin than some other types of hair removal. Waxing can remove a layer of skin along with the hair, especially in people whose skin has become more delicate or fragile. Also, allergic reactions to threading are rare, because the only equipment used is a simple cotton string instead of a wax, for example, that could contain irritating substances.