Acupuncture has become a widely used treatment modality in various musculoskeletal pain conditions. Acupuncture is also shown to enhance blood flow and recovery in surgical flaps due to certain substances released by needle stimulation. In a previous study on healthy subjects, researchers found that stimulation into the anterior tibial muscle increased both skin and muscle blood flow. The aim of this study was to examine the effect of needle stimulation on local blood flow in the anterior tibial muscle and overlying skin in patients suffering from a widespread chronic pain condition.

Fifteen patients with fibromyalgia participated in the study. The authors performed two modes of needling — deep muscle stimulation and subcutaneous needle insertion — at the upper anterior aspect of the tibia, and assessed the resulting blood flow.

The results of the present study were partly similar to those earlier found at a corresponding site in healthy female subjects. However, in fibromyalgia patients subcutaneous needle insertion was followed by a significant increase in both skin and muscle blood flow, in contrast to findings in healthy subjects where no significant blood flow increase was found following the subcutaneous needling. The different results of subcutaneous needling between the groups may be related to a greater sensitivity to pain and other somatosensory input in fibromyalgia.