Hey Markus!
I'm about to sign off for the night. I was actually relieved that one of you MDs agreed with my suspicion. I see a lot of Herpes Simplex, but not much Shingles. Like I said, If it's contact dermatitis (poison oak) it will get better. If it's Herpes Zoster, it will get worse. Gotta be receptive to the progression of the disease to come up with the diagnosis.
I thank the OP for posting pics of his wifes' (fine) skin! Hubba-Hubba!
Best wishes to y'all. I'll be waiting to see how this resolves.
Nice job on the Who's Who thread, BTW.