How does acupuncture affect the body? Acupuncture points are believed to stimulate the central nervous system. This, in turn, releases chemicals into the muscles, spinal cord, and brain. These biochemical changes may stimulate the body's natural healing abilities and promote physical and emotional well-being. National Institutes of Health (NIH) studies have shown that acupuncture is an effective treatment alone or in combination with conventional therapies to treat the following: Nausea caused by surgical anesthesia and cancer chemotherapy Dental pain after surgery Addiction Headaches Menstrual cramps Tennis elbow Fibromyalgia Myofascial pain Osteoarthritis Low back pain Carpal tunnel syndrome Asthma It may also help with stroke rehabilitation.