Hey. This is old post but if u ever found out what was wrong pls reply. I was experiencing this on my right side all over the backside of body and I finally have an answer but it was not disease. Was dx w lupus but I really don’t think that what I have but I stay on low dose of plaquenil bec dr told me if I come off it, as I did once that it can stop working if u go on/off them. If interested in what I figured out pls reply