--it certainly possible for CERTAIN autoimmune neuropathies to go into remission, especially some, like Guillain Barre syndrome, that have an actue onset. A large number of people recover from such syndromes, though often they have some residual permanent damage, due to the fact that myelin sheathing and/or nerve fibers don't regenerate in the same pattern they were in before the syndrome.

There are also certain neuropathy, such as chronic inflammatory demyelinating polyneuroapthy (CIDP) that have a relapsing-remitting course as part of their identifying description, similar to certain forms of multiple sclerosis.

Many (myself included) have reported that as nerves regenerate, they get all manner of odd sensations--pain, jabs, shocks, tingles, you name it--this seems to have something to do with the axoinal "growth cones" moving through other tissues to find thei rconeectin targets, but while doing so sensations are interpreted in all sorts of weird ways by the brain.