I have psoriasis, which is also (contrary to what most people think) an immune disorder. It can also cause arthritis. It's never gotten bad enough for me to do anything but pop a couple advil and make sure to keep my joints warm / moving however. I hear you about doctor's not caring enough about anything like that though... although I started going to a new doctor a year or two ago and I just complained about a couple small aches and creaks and he sent me for like 924839283489 x-rays. The people at the clinic were asking whether I'd been in a bad car accident or something and were totally confused when I told them I hadn't really "hurt myself". Strange guy. Dirty office too. Don't see him anymore.