Here's the odd thing- I do not have typical nerve pain. Just loss of balance. Made it very hard to diagnose. The pain I have now is a "moving the muscle" type pain, not pain for no reason or pain at touching. I suspect (and I suspect dr. thinks this, too) that I have a neuromuscular degenerative condition, not autoimmune per se. So not sure my experience is helpful. If your pain is from an autoimmune condition, IvIg will probably help.