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Rheumatoid arthritis (RA) can affect many different joints and, in some people, other parts of the body as well, including the blood, the lungs, and the heart.<br />
Inflammation of the joint lining, called the synovium, can cause pain, stiffness, swelling, warmth, and redness. The affected joint may also lose its shape, resulting in loss of normal movement. RA can last a long time and can be a disease of flares (active symptoms) and remissions (few to no symptoms).</p>
