--like a sub-acute autoimmune molecular mimicry reaction from the description provided (not all that different from the one that presumably caused my acute-onset body-wide burning neuropathy in 2003--just a little bit slower in onset).

Many times a prodrome infection or vaccination can cause an autoimmune cascade that attacks nerve (and other tissues). Molecular mimicry is a leading hypothesis into the etiology of autoimmunity--the body mounts an immune response to a pathogen that has a molecular shape similar to that of some bodily tissue, and the now activated immune system attacks whatever has that molecular shape, including the body tissue, and has great difficulty in shutting off.

As I mentioned earlier in the thread, much more extensive testing--likely available primarily at a major neuropathy center (Johns Hopkins, Cornell Weill, Jack Miller, Massachusetts General, Jacksonville Shands) may be called for here.