Acupuncture for Chronic Low Back Pain Mechanisms, Evidence, and Clinical Application

Chronic low back pain (CLBP) is a leading cause of disability worldwide, affecting approximately 80% of the general population at some point in their lives. Despite the availability of pharmacological and non-pharmacological conventional therapies, many patients fail to achieve satisfactory pain relief. Acupuncture, a core modality of Traditional Chinese Medicine (TCM), has emerged as a promising evidence-based intervention for CLBP management. This article provides a comprehensive review of the neurophysiological mechanisms underlying acupuncture analgesia, synthesizes current evidence from systematic reviews, meta-analyses, and randomized controlled trials, and presents a practical framework for clinical application integrating TCM pattern differentiation (辨证论治) with modern clinical guidelines. The neurophysiological basis of acupuncture involves multimodal mechanisms including modulation of endogenous opioid systems, regulation of transient receptor potential channels, inhibition of spinal dorsal horn long-term potentiation, and engagement of the autonomic nervous system. Evidence from a 2024 umbrella review of 66 studies demonstrates highly suggestive evidence for immediate and short-term analgesic effects, with suggestive evidence supporting intermediate-term benefits. Clinical practice guidelines from the World Health Organization (2024), the World Federation of Acupuncture-Moxibustion Societies (2023), and the American College of Physicians (2017) all recommend acupuncture as a first-line non-pharmacological treatment for chronic low back pain. TCM pattern differentiation identifies three primary patterns in CLBP—Kidney Deficiency (肾虚), Cold-Damp Bi (寒湿痹阻), and Blood Stasis (血瘀)—each requiring individualized point selection and treatment protocols. This integrated approach offers patients a personalized, system-oriented treatment strategy that complements conventional medical management. Future research should focus on optimizing acupuncture protocols, identifying predictors of treatment response, and conducting large-scale comparative effectiveness trials.