Hi there. This could be CRPS or regional
pain syndrome. There is usually no cure for it.
Pain can be attempted to be relieved with psychotherapy, physical therapy and drugs like topical analgesics, narcotics, corticosteroids, antidepressants and anti seizure drugs. Other modalities are sympathetic nerve blocks, surgical sympathetectomy, intrathecal drug pumps and spinal cord stimulation. Discuss this possible diagnosis and management modalities with your neurologist. Hope this helps. Take care.