I keep Lidoderm patches on hand and apply to any area that has even a slight injury. Since adapting this strategy, I no longer experience trauma induced spread. (When I experienced RSD pain in my jaw, teeth, and tongue, this was no help, of course.)

I keep a steroid pack on hand, incase of urgent need, if the above approach isn't enough. If I had a serious enough injury, I'd fight my insurance for a block and/or Ketamine--or just go out of pocket.

I regularly take baths with Epsom Salts. I severely limit my exposure to environments that cause me to flare. I break up my activities in small chunks and really listen to my body. I've adapted and don't do things in the same way that cause my pain to escalate.

If my back or neck become more problematic (there's always low level pain and swelling) then I see a massage therapist.