Is used for the relief of pain. The "puncture" in acupuncture refers to insertion of tiny needles at certain very specific points on the surface of the bodyThe actual insertion of the hair-thin, disposable needles has been described as feeling like a mosquito bite. After insertion, the needles may be stimulated by twirling them or connecting them to a mild electrical current (there is no risk of electrical shock). This stimulation may cause a mild tingling or aching sensation referred to as "de qi." The needles may be inserted from a fraction of an inch up to about one inch deep. They can either be withdrawn a few seconds after insertion or kept in place for up to 30 minutes.