Acupuncture has been studied for a wide range of pain conditions, such as postoperative dental pain, carpal tunnel syndrome, fibromyalgia, headache, low-back pain, menstrual cramps, myofascial pain, osteoarthritis, and tennis elbow.
Overall, it can be very difficult to compare acupuncture research results from study to study and to draw conclusions from the cumulative body of evidence. This is because studies may use different acupuncture techniques (e.g., electrical vs. manual), controls (comparison groups), and outcome measures.
One particularly complex factor in acupuncture research is choosing the controls for a clinical trial.
The choice depends in part on whether the researchers want to study a particular aspect of acupuncture (e.g., effects on the brain) or to determine whether acupuncture is useful compared with other forms of care. Examples of control groups include study participants who receive no acupuncture, simulated acupuncture (procedures that mimic acupuncture, sometimes also referred to as "placebo" or "sham"), or other treatments (in addition to or in place of acupuncture or simulated acupuncture).
An emerging theme in acupuncture research is the role of the placebo. For example, a 2009 systematic review of research on the pain-relieving effects of acupuncture compared with placebo (simulated) or no acupuncture was inconclusive.
The reviewers found a small difference between acupuncture and placebo and a moderate difference between placebo and no acupuncture; the effect of placebo acupuncture varied considerably, and the effect of acupuncture appeared unrelated to the specific kind of placebo procedure used. All of the study participants received standard care, typically consisting of analgesic drugs and physical therapy.
The following sections summarize research on acupuncture for a variety of pain conditions, including those reported by NHIS respondents who had used acupuncture. In general, acupuncture appears to be a promising alternative for some of these pain conditions; however, further research is needed.
