YIKES!!! Sorry about your new yucko's Sally...
I have added another autoimmune prob to my list this yr too... I started out itching and thought I had hives.... After 3 different Dr's ... I was dx'd w/Dermatographism, which shows itself in welts when something scratches or rubs against my skin.
I take RX antihistamines at timed intervals or I would be one big red blotch... The itching was just about to drive me outta the last little bit of mind I have left...
The Dr told me to keep Aquaphilic cream on my skin, which also helps along w/Hydrocortisone cream when it's real bad.... take care....
A friend of mine has psoriasis and it drives her crazy!!!!! I really feel for ya!