Abstract
The author reports a patient who complained of persistent pain, dysesthesia, and swelling of the lower limb after traffic accident and was treated with lumbar sympathetic ganglion block. A 64-year-old man was suspected of being malingering. However, detailed history taking and precise physical examination suggested that the patient was suffering from complex regional pain syndrome. Repeated nerve blocks and active mobilization of the limb by the patient improved the pain. Lumbar sympathetic ganglion block performed 9 months after the accident markedly improved the pain and dysfunction.