Di, as I was reading it, I said, "Oh, crap!" I'm sure you know how to assess whether it's RSD, so go with your own Dx.

My guess would be that the original site was where you experienced trauma while the spread site is coming on much more gradually because it's really brain and nerve issues, not trauma.

Remember though. I'm back here because I made it to remission so do not let a day go by that you choose to accept your fate, but instead, concentrate on being in remission.