This subject is new to me, but I seem to have developed Psoriasis too.

Not nearly as drastic as for several of you, but very annoying. I have
several spots that itch terribly for a while, that I claw at til I draw blood.
I have had some limited success with Benadryl liqiud (topical) and the
over-the-counter hydrocortizone creams. Just slows the itch a bit. Oddly,
the symptoms will suddenly disappear for a while, and return weeks or
months later.

More weird autoimmune stuff? It never seems to end!

Interesting that the sunlight helps some...I haven't documented occurances to see if that is what changes things for me. Probably should.