About This Condition
Rheumatoid arthritis (RA) is a chronic inflammatory disease in which the immune system attacks the joints and sometimes other parts of the body. The cause of RA remains unknown.
The most common symptom of RA is joint pain and morning joint stiffness. Several joints on both sides of the body are usually affected, especially those of the hands, wrists, knees, and feet. Affected joints may feel warm or appear swollen. People with RA may have other symptoms, including weakness, fatigue, weight loss, and, occasionally, fever.
Joint replacement surgery is sometimes used in cases of severe deformity or disability.