Moxibustion for rheumatic conditions: a systematic review and meta-analysis

Moxibustion is a therapy from traditional East Asian medicine that uses heat generated by burning herbal preparations, primarily containing Artemisia vulgaris, applied to specific points on the body. Traditionally, this technique has been used to treat various rheumatic conditions, including rheumatoid arthritis, osteoarthritis, fibromyalgia, and other diseases that affect joints and muscles. Rheumatic conditions comprise more than 150 diseases and syndromes, generally progressive and associated with pain, including osteoporosis, lupus, and gout. People with severe chronic rheumatic conditions are particularly likely to seek complementary therapies such as moxibustion, especially because of the limitations and side effects of conventional treatments.

This study represents the first systematic review specifically on the efficacy of moxibustion for rheumatic conditions. The objective of the research was to gather and critically evaluate all available scientific evidence on the use of moxibustion as a symptomatic treatment for rheumatic conditions. The researchers conducted a comprehensive search across 14 medical databases, including Western and East Asian databases, from the inception of each database through May 2010, without language restrictions. Only randomized clinical trials testing moxibustion as a single treatment or combined with conventional medications, comparing with control groups receiving standardized medications, were included.

The methodological quality of the studies was assessed using rigorous criteria from the Cochrane Collaboration, and where appropriate, data were combined in meta-analyses to obtain more robust conclusions.

The search identified 14 randomized clinical trials that met the inclusion criteria, covering a total of 972 patients with various rheumatic conditions. The studies covered knee osteoarthritis, rheumatoid arthritis, ankylosing spondylitis, gouty arthritis, and fibromyalgia. All studies were conducted in China and were based on Traditional Chinese Medicine principles for the selection of application points. The meta-analysis of the eight studies that compared moxibustion with drug therapy showed favorable effects of moxibustion on treatment response rate.

When analyzed by disease subgroups, moxibustion showed significant effects for knee osteoarthritis, but did not demonstrate clear efficacy for rheumatoid arthritis or ankylosing spondylitis. Six studies that tested moxibustion combined with medications versus medications alone also suggested beneficial effects of the combination. Only two studies reported adverse effects, indicating that moxibustion appeared to be safe in the contexts studied.

The results suggest that moxibustion may be a promising therapeutic option for certain rheumatic conditions, particularly knee osteoarthritis. For patients living with chronic pain and functional limitations, these findings offer hope for an alternative or complement to conventional treatments. Moxibustion may be especially attractive for people who experience side effects from anti-inflammatory medications or who seek more natural approaches to pain control. For healthcare professionals, the results indicate that moxibustion may be considered as part of an integrated treatment plan, especially when combined with conventional therapies.

However, it is important that qualified professionals perform the assessment and application of the technique, following Traditional Chinese Medicine principles for the appropriate selection of treatment points. The apparent safety of the technique, as indicated by the few reported adverse effects, is also encouraging for its clinical application.

However, the study has significant limitations that should be considered in the interpretation of the results. All included studies had low methodological quality, with significant problems in randomization, allocation concealment, and lack of adequate blinding. The impossibility of blinding patients and therapists with regard to the application of moxibustion represents an inherent challenge in this type of research, as participants know they are receiving the treatment. In addition, all studies were conducted in China, where negative results in traditional medicine research are rarely observed, which raises concerns about possible publication bias.

The total number of participants across studies was relatively small, and there was high heterogeneity among studies, making it difficult to generalize the results. None of the studies used appropriate placebo controls to differentiate specific effects of moxibustion from non-specific effects, such as the additional attention received by patients.

In conclusion, although the results suggest promising effects of moxibustion for rheumatic conditions, particularly knee osteoarthritis, current evidence is insufficient to establish definitive conclusions about its efficacy. The findings should be interpreted with caution due to the significant methodological limitations of the included studies. Future studies are needed and should overcome these methodological shortcomings, including better randomization, appropriate placebo controls, larger samples, and evaluation by independent investigators. Patients interested in moxibustion should discuss this option with their physicians, considering it as a complement, not a substitute, to established conventional treatments.

The technique appears to be safe when applied appropriately, but more high-quality research is needed to definitively determine its place in the treatment of rheumatic conditions.