Just got back from the dermatologist.
He listened to my story (no apparent injury or reason for wound, timeline, looked at photos, discussed prior dermatologic history), and he believes it is
Ecthyma (second info link
here). Basically: a deep skin infection caused by strep or staph.
He's got me on
doxycycline for a month, combined with keeping it covered with
mupriocin ointment, and putting a bandage over it to help protect it. He also wants me to follow-up in a month to see how it is going. If it hasn't been healing very well, he'll biopsy the area.
Unfortunately he said that this sort of thing is more common in people like me who have eczema, since we have lost part of our skin's natural protective barrier. Which would make sense in this case, because this occurred in an area where I had some eczema awhile back (although it seems to be gone away).
The doctor also liked all the photos I've been taking
and requested I keep taking them to watch the progression.
As to this being a spider bite: he said that only a brown recluse would do something like this, but they just aren't in this area of NC unless I went to the western NC mountains, TN, or northern AL regions and just happened to bring one back with me.
He also mentioned that it was
good that the scab (he had a technical term for it but I can't remember
) came off.
I'll keep you guys and gals updated.