I have CRPS (RSD) in my back as well as other places. Sleeping was horrible for quite a long time after the RSD first spread and I was only getting at most 15 minutes of sleep at one time for months on end. I went through desensitization therapy for my back and that helped a lot with normalizing the sensation there. There's still pain...but I can tolerate it now. I was put on amitriptyline for a while and that got me at least 3 hours of sleep at a stretch which was MUCH better than what I had been getting before. Then I started doing tDCS therapy and after more than a month of use (I think closer to two months but I'd have to double check my old posts to be sure) I started to sleep better and better. I now am able to normally get 6-8 hours of sleep a night and everything is better for me getting regular sleep and rest. The pain is still there as always...but being rested makes tolerating it so much easier.

I also find hot baths with Epsom salts and lidocaine cream can be big helps (as well as a heating pad to help with the pain) when it comes to my back. I also have Lidoderm patches which I use when the pain is in a particular area vs all over (the cream seems to work better for that...but it does need to be applied more often where the patches can stay on for 12 hours at a time).