Acupuncture on GB26 to Treat Chronic Low Back Pain

Inclusion Criteria: * Adults (both male and female) with non-specific low back pain for more than three months. * Age range: between 20 and 60 years. * Willingness of the patient to participate in the study, and written informed consent signed and personally dated by the patient. * Chronic non-specific low back pain clinically diagnosed as repeated lumbar sourness and swelling pain or a chronic progressive process, accompanied by (i) X-ray examination to exclude lumbar vertebrate fractures, spondylolysis, spondylolisthesis and severe osteoporosis, and/or (ii) MRI with normal signal or low nucleus pulposus signal. Exclusion Criteria: * Age less than 20 or greater than 60 years * Specific causes of back pain (e.g., cancer, fractures, spinal stenosis, infections) * Complicated back problems (e.g., prior back surgery, medico-legal issues) * Possible contraindications for acupuncture (e.g., coagulation disorders, cardiac pacemakers, pregnancy, seizure disorder), and conditions that might confound treatment effects or interpretation of results (e.g., severe fibromyalgia, rheumatoid arthritis) * Conditions making treatment difficult (e.g., paralysis, psychoses, or other severe psychiatric problems based on the judgment of a physician investigator and/or a T score \>60 on the psychological assessments performed during Session 1) * Prior acupuncture treatment for back pain; 1 year minimum for any other condition. * The intent to undergo surgery during the time of involvement in the study. * History of cardiac, respiratory, or nervous system disease that, in the judgment of a physician investigator, precludes participation in the study because of a heightened potential for adverse outcome (e.g., asthma, claustrophobia) * Presence of any contraindications to MRI scanning (e.g., cardiac pacemaker, metal implants, fear of closed spaces, pregnancy) * Active substance abuse disorders within the last 24 months, based on subject self-report * Radicular knee pain extending below the knee