Also, in regards to the sweating, if this began before the Prednisone (in the SAME fashion) then I would say it's not related to the steroids. But I understood your post to indicate it either started or got much worse much more recently which coincided with the Prednisone. If you still plant to come off before your surgery, then you will know for sure.

Keep in mind that sweating problems are common with autonomic dysfunction. Didn't you have a skin biopsy? If so, they would have assessed the autonomic fibers. A QSART or Thermoregulatory Sweat test would confirm or rule out any autonomic dysfunction in regards to your sweating.