Acupuncture

Acupuncture(针灸/針灸) (from the Latin word acus, "needle", and pungere, meaning "prick") Is a technique in which the practitioner inserts fine needles into specific points on the patient's body. Usually about a dozen acupoints are needled in one session, although the number of needles used may range anywhere from just one or two to 20 or more. The intended effect is to increase circulation and balance energy (Qi) within the body.

Issues in study design
Blinding of the practitioner in acupuncture remains challenging. One proposed solution to blinding patients has been the development of "sham acupuncture", i.e., needling performed superficially or at non-acupuncture sites.

Controversy remains over whether, and under what conditions, sham acupuncture may function as a true placebo, particularly in studies on pain, in which insertion of needles anywhere near painful regions may elicit a beneficial response. A review in 2007 noted several issues confounding sham acupuncture:

A controlled study of 300 migraine patients found that both needling at non-acupuncture sites and real acupuncture resulted in improvements compared with patients on a waiting list, with no significant difference in benefit between the two groups.

A study by Ted Kaptchuk et. al. showed that sham acupuncture exerted a stronger effect on pain than an inert pill did, and concluded: "Placebo effects seem to be malleable and depend on the behaviours embedded in medical rituals."