< Back to All Videos thirdAGE > What Causes Rheumatoid Arthritis? Up Next... 10 Technology and Hand Pain Technology and Hand Pain Yoga and Back Pain Treating Knee Osteoarthritis Loading the player ... Bone + Joint Health What Causes Rheumatoid Arthritis? RA is a serious autoimmune diseaseΓÇöbut what causes it? Related Videos Technology and Hand Pain Yoga and Back Pain Treating Knee Osteoarthritis Treating Back Pain