Autoimmunity = not understood disease?

No.13066879 ViewReplyOriginalReport
Listen up, /sci/. I'm so fucked. I got some bullshit arthritis overnight. Pic related is a stock pic, but it looks very similar.
I've seen pics of how it ends and it is horrible.
Please explain to me, how in the fuck can the body attack itself? It is appalling that doctors are Ok with this stupid "autoimmunity" explanation. I'd rather believe that the body IS in fact attacking something deep into the joints. Or maybe something in our environment is triggering it.
Is there any relevant investigation trying to shed some light on this? Apparently doctors are fine with treating diseases of UNKNOWN causes with chemotherapy drugs from the 1950s.