Hi Trix,
On the old forum I had posted a similar mylay. At times I also got a tiny scabbs like along the path. Just liek wa said a cat scrath.
It reminded me of when my son had shingles, the aggrivated nerve path.
I found that Valtrex, and bynadryl cream, or something with lidcain in it, like a preperation H product, perianal, or insect releif, calmed it down.

For prevention, I found a small dose of Topomax has helped the best.
I also think when you see the doctor mention Allodynia. It is a hyper nerve reaction to long term chronic nerve activity. The nerves travel to the brain and send messages. When you feel something instead of a pin prick, it seems a stabbing. Or if someone touches your arm in an attention getter, it feels like a painful pressure point remains.
I will look for some literature for you to print to take.
Di