Just a thought, but when I was on Humira (another immunosuppressant) I developed Psoriasis which manifested as little pimples or blisters with no fluid in them. They were very itchy and I tried everything to get rid of them before going to the dr and finding out what they were. Psriasis is an autoimmune disease also.
Do they kinda look like these?
I only had about 15 or so spots on my trunk but when one started on my face, I told the Dr I wanted off Humira. Apparently it is a contra indication. Now that I have stopped taking Humira, they have dried almost completely up and no new ones have surfaced.
They may not be the same thing at all and I was on a completely different med, but saw your post and wanted to comment. I didn't know that it was a possibility with these meds, but from what the dermatologist told me, it's a lot more common than I thought.