I have been diagnosed with RA for 9 years and I have been told I also have Osteoarthritis in my knees and wrists. I moved from New York to California just a few months ago so I have only seen the new RA doctor twice. When I told her I have been having increased pain in my knees lately, she immediately wanted to improve my RA medication. When I asked her if osteoarthritis could be the cause of my pain, she could not answer me directly, except by saying that my MRI of the left knee from last year did show serious cartridge damage. She increased my RA medication anyway. I am left a little lost. I don't want to overtreat my RA if that is not the cause of my pain, but how do I know? Are there any tests that could define RA or Osteoarthritis accurately? Thank you!