How Acupuncture Works From the Perspective of Western Medicine

After thousands of years of practice, we know that acupuncture works, but the West is still trying to understand why. Acupuncture derives from the concept in traditional Chinese medicine that disease results from a disruption in the flow of chi—the body's circulating life energy—and imbalances in the forces of yin and yang. Chi is said to flow along pathways in the human body known as meridians. According to Eastern thought, there are as many as 20 meridians and more than 2,000 acupuncture points found along them. Applying tiny needles—or, sometimes, pressure or heat—to those points is believed to deliver therapeutic effects for patients. 

The success of acupuncture is evident in its popularity in the U.S. and its growing acceptance among medical professionals. A 2002 National Center for Health Statistics survey estimated that 8.2 million adults had tried acupuncture. Acupuncture needles are regulated by the Food and Drug Administration, and the therapy is sometimes approved by insurance.

But just how it works is a mystery Western researchers are still attempting to understand. In a consensus statement issued by the National Institutes of Health in 1997, scientists acknowledged that some of the tenets of acupuncture—like the flow of chi and the network of meridians—is "difficult to reconcile with contemporary biomedical information," but argued that there is "clear evidence" that acupuncture works for treatment of postoperative and chemotherapy-induced nausea and vomiting. They also found evidence of pain relief from conditions such as postoperative dental pain, menstrual cramps, tennis elbow, and fibromyalgia. In other words, we don't know how it works, but it seems to. Here are a few ways going under the needles may alleviate pain.