Causalgia

A persistent, burning pain, usually in an arm or leg, most often as a result of injury to a nerve by a deep cut, limb fracture, or gunshot wound. The skin overlying the painful area may be red and tender, or blue, cold, and clammy. Causalgia may be aggravated by light sensations, such as touch, or emotional factors. In some cases, treatment with antidepressant drugs or anticonvulsant drugs may be effective. A few people benefit from sympathectomy, an operation in which nerves are severed.