/dairy. The rashes are still there, even after moving, washing sheets (and getting new ones), wearing same clothing items or getting new ones, while vacationing elsewhere, while omitting dairy products a few days, while trying other foods a few days. Rashes are still there, no matter if it's cold or hot outside.
, hives, pityriasis rosea, psoriasis or eczema. Since the rash has been present for 2 years, I suggest you to get an evaluation done from a dermatologist for these possibilities and get a biopsy skin done.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your dermatologist. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.