I have had full body and internal RSD for 8 years now, there are chances of lowering the pain. I was to the point I was bed ridden, all limbs were in dystonia, I was in so much pain my mom couldn't even kiss my forehead and just the sound of the machines going down the hall in the hospital that my body would start shaking even when I was sleeping, and I was being hospitalized every 1-2 weeks. I finally got a doctor to help find a med combination that helped me, starting with ketamine infusions. And at home something that really helps is the ketamine nasal spray and lozanges. It is possible, I don't know about full remission.
Anything I can do to help I will

Sam