Complex regional pain syndrome (CRPS) is a syndrome that is not yet understood by doctors. When a disease or syndrome is not understood, it becomes more difficult to find a treatment.
That being said, there is on-going research and clinical studies are being done to try to find treatments. Currently, some studies are investigating the use of lenalidomide, a medication used to treat myelodysplastic syndrome, and ketamine, a type of anesthetic. Other studies are also in progress.