--to cause the type of microvascular disruption that results innerve damage--wild blood sugar swings, and/or a fairly constant "impaired glucose tolerance" level that would be below that at which one would be diagnosed with frank diabetes, can also do it.

Still, given what you've reported, I wouldn't automatically assume that your "new" neuropathy symptoms are necessarily related to high blood sugar.
They well could be, but too many doctors notice a high blood sugar reading and stop their investigations. Given the Lyme history, an autoimmune molecular mimicry effect may be involved, especially with the atypical body part presentation.