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