my dr has ran blood tests on me last week to rule out autoimmune disease;s,,i pray and ask for the prayers of the group to keep me in prayer,I'll have the results next monday,,,my pain med dr,,says and alot of info that ive read,says that alot can be a precursor to rsd and one disease can cause another,,and alot of things such as our habits ,drugs what we eat and what our body lacks can trigger an autoimmune,,See what your dr says and the group of their experience.. ive read so much about it that im exhausted,,but ,,yes all things are possible,,,good luck,,,do a google search as well,