Welcome to Neuro Talk. I am so sorry your husband has to go through this. I also understand you are tired. There are infusions that can help, from what I have understood about this disease. I have RSD just in foot, and ankle.
Please seek a doctor who specializes in RSD. This site may be able to direct you to someone in your area. A physiatrist also may be of value. they don't just treat for pain, but at a cellular level. This isn't a branch of medicine I knew about before I found my current doctor. There are medications that can help, and some lotions including Ketamine, that cut down on the burning. The physician has to be awhere of all that is available to a person in cronic pain. You will get support right here. Hope you get a lot of responses, so you can help your husband. Please take care of yourself too, this is very hard on a family who deals with this. I will keep you and your husband in my thoughts and prayers. ginnie