Acupuncture Therapy for Extremity Musculoskeletal Pain: A Clinically Focused Evidence Synthesis with Therapeutic Implications

Musculoskeletal pain in the extremities of the arms and legs represents one of the leading health problems worldwide, affecting millions of people and causing significant limitations in quality of life. This condition includes problems such as tendinitis (inflammation of the tendons), carpal tunnel syndrome, knee pain, and plantar fasciitis. Conventional treatments, such as anti-inflammatories, corticosteroid injections, and physical therapy, often offer only temporary relief and may produce significant side effects. Anti-inflammatories can cause gastrointestinal and cardiovascular problems, while repeated corticosteroid injections can accelerate tissue degeneration.

Faced with these limitations, acupuncture has emerged as a promising therapeutic alternative, increasingly integrated into conventional medical care because of its potential to provide pain relief with minimal risk.

This research aimed to scientifically evaluate the efficacy of acupuncture in the treatment of extremity musculoskeletal pain. The investigators carried out a comprehensive search of recognized medical databases, analyzing studies published between January 2015 and June 2024. Only high-quality studies were included, such as randomized controlled trials and systematic reviews, involving adults diagnosed with specific conditions: lateral epicondylitis (tennis elbow), carpal tunnel syndrome, patellofemoral pain syndrome (knee pain), and plantar heel pain syndrome (plantar fasciitis). The rigorous methodology yielded 19 relevant studies, including 10 clinical trials and 9 systematic reviews, which were analyzed narratively to extract evidence on the efficacy of different acupuncture modalities.

The results revealed important differences in the efficacy of acupuncture depending on the condition treated and the technique used. For lateral epicondylitis, manual acupuncture showed short-term benefits, while dry needling demonstrated superior long-term effects, especially when combined with other therapies. In carpal tunnel syndrome, the evidence was insufficient and contradictory, with many studies showing a high risk of methodological bias, precluding consistent recommendations. For patellofemoral pain syndrome, dry needling of trigger points produced short- to medium-term pain relief, although its added value within multimodal therapies was inconsistent.

The most promising results were observed in plantar heel pain syndrome, where both electroacupuncture and dry needling produced significant improvements in pain and function, with benefits sustained for more than three months. Importantly, all studies reported that acupuncture produced few adverse events, limited mainly to mild pain at the application site.

For patients and clinicians, these findings have important clinical implications. Acupuncture emerges as a safe, low-risk therapeutic option that can be considered as part of comprehensive treatment strategies, particularly for patients who have not responded adequately to conventional therapy or who seek alternatives to medications. For conditions such as plantar fasciitis and lateral epicondylitis, acupuncture can be recommended with greater confidence, supported by more robust evidence. Patients with knee pain may benefit from short-term dry needling, while those with carpal tunnel syndrome should be informed that current evidence is limited.

It is essential that acupuncture be integrated into a multimodal treatment plan, individualized to each patient's needs, preferences, and characteristics, and always delivered by qualified, experienced clinicians.

The study has several important limitations that should be considered when interpreting the results. Methodological heterogeneity among the included studies — including different acupuncture protocols, point selection, treatment frequency, and duration — makes direct comparisons difficult. Many included studies had limited methodological quality and small samples, yielding evidence of low to moderate certainty under rigorous scientific criteria. In addition, the search was restricted to English-language publications, potentially excluding relevant studies from other regions.

The investigators emphasize the need for larger future studies with standardized protocols and direct comparisons between different acupuncture modalities. Despite these limitations, the findings suggest that acupuncture is a valuable therapeutic option within the treatment armamentarium for extremity musculoskeletal pain, offering hope to patients seeking safe and effective alternatives for the management of painful conditions.