Treatment was made on 702 cases of parodonitic pain chiefly by acupuncturing the original points on Yangming channel (Hegu and Chongyang)

and the "relay" method to enhance the propagated sensation and the "block" method to hinder it were tried. The following relations were observed between the propagated sensation along channels and the acupuncture analgesia: The stronger the propagated sensation was

the better analgesic effect the acupuncture would have; "relay" could enhance the propagated sensation and the efficacy of acupuncture analgesia; "block" could enlarge the scope of propagated sensation below the blocked site and enhance the analgesia efficacy; the propagated sensation was strong in diseased persons; in channel-sensitive persons the sensation propagated to the site of disease; the propagated sensation weakened or lost after the cease of pain. Therefore

modification of the dynamic process of propagated sensation along channels is a simple and effective method for anesthesia.