Rheumatoid Arthritis Basics: Overview, Symptoms, and Causes
https://www.niams.nih.gov/health-topics/rheumatoid-arthritis/basics/symptoms-causes
WEBDec 11, 2023 · Rheumatoid arthritis (RA) is a chronic (long-lasting) disease that mostly affects joints, such as the wrist, hands, feet, spine, knees, and jaw. In joints, RA causes inflammation that leads to: Pain. Swelling. Stiffness. Loss of function. Rheumatoid arthritis is an autoimmune disorder because the immune system attacks the healthy joint tissues.
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