@becsbuddy - Thank you for this reference. Actually 2 separate neurologists told me very definitely I do NOT have CIDP. But after numerous tests, they cannot tell me the cause of my symptoms. These are: very gradually increasing sense of electrical current starting at the bottom of legs and over years rising to the rest of my body. My legs getting weaker. I can still walk a few miles, but every step feels like I could fall, especially going downhill. The only diagnosis I have is OLP, an auto-immune inflammation in my mouth. Any ideas from anyone would be much appreciated. A pharma. company suggested that symptoms fit CIDP.