--though I'm sorry about what is bringing you here.
Neuropathy, unfortunately, is a common secondary results of many types of autoimmune collagen/connective tissue/vascular autoimmunities (almost any of the conditions associated with variants of the anti-nuclear antibody, or ANA). It can occur both as a result of direct compression on nerves from the tissue changes and through autoimmune mechanisms as well.
I would come on over to the Neuropathy forum here, if you haven't already--lots of information and empathy:
Also, this is the link to the Washington University Neuromuscular database, which has lots of information on many types of neuropathy--I've linked specifically here to the collagen/vascular/ANA section: