Rheumatoid arthritis, or RA, is a chronic disease. It occurs when the immune system—which is designed to protect your health by attacking foreign cells—attacks the body’s own joints and the tissues that line them.
The symptoms of RA can vary from person to person and from day to day. Symptoms can include:
RA is symmetrical, meaning that a symptom on one side of the body tends to occur in the same location on the other side as well.
Medicines used to treat RA include:
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