Abstract
We report the case of a 42-year-old man who suffered from trauma-induced complex regional pain syndrome (CRPS) in the right upper limb, four years after improvement of left lower limb CRPS that was controlled by spinal cord stimulation. The spontaneous burning pain on his right forearm increased with movement, and it degraded the range of motion and was severe enough to interfere with his work. After diagnosis with traumainduced right forearm CRPS, he was treated with the ultrasound-guided interscalene approach brachial plexus blockade and medication. Mechanical-allodynia impeded early rehabilitation; however, following peripheral nerve block, the rehabilitation could be intervened. Two months after the initial visit to our pain clinic, his spontaneous pain and allodynia were diminished, and the range of motion was improved; therefore he was able to carry on daily life and resume work. The peripheral nerve blockade of somatic afferent inputs from the forearm probably debased his central hypersensitivity relating to pain.
