Interesting question. I basically had two revelations. The first was after a bark scorpion sting on the second toe of my left foot. I was numb from the waist down for 24 hours. Then the numbness subsided but I recognized that the sting area and the adjacent area were still numb -- a year later. Then, I started having a lot of tingling, zaps, and other neurological issues and had it all checked out. Discovered that the strange feeling in the back of my legs (especially in the shower) were known as "socks" and that the sensation I was experiencing when I started to walk was all part of the neuropathy. Click! It fell together.

Good question - thanks for asking.