Thanks very much for your suggestions. I will look those up.
For the first year or so, this parasite(?) affected my body and not especially my head. As they died out in my body it seemed to get worse in my head .. although maybe they just migrated there to get away from the hot showers, etc.
For a long while now, I have been inclined to think it's Lyme disease. The red streaks and cysts on my back were a couple of rasons, although this thing has morphed into many different stages.
I've also had the red streaks on my face and neck.
The "worm" (or whatever) crawling around my ear was something new, so that threw me off. As of today, there is no more sensation of movement around my ear, but it is extremely red and the blister-like bumps are still there. The pain is gone.
Again, I will study up on your suggestions and see if maybe one of them correlates to this latest development. Thanks.