I'm not too sure, but I think I suffered arthritis-like symptoms years ago. I was given something similar to an arthritis pain treatment, but the doctors were really never sure what it was. The symptoms were sort of confusing for them but for me the pain was really unbearable! I mean, I could barely twist my wrist or go down a flight of stairs without somebody helping me. Somehow the symptoms just went away after a few days.
Weird. I hope I never experience that again!