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Rheumatoid Arthritis Health Center

Rheumatoid Arthritis Overview

Rheumatoid arthritis (RA) happens when your body's defenses – your immune system – targets your joint linings. RA affects joints on both sides of the body, such as both hands, both wrists, or both knees. This symmetry helps to set it apart from other types of arthritis. It can also affect the skin, eyes, lungs, heart, blood, or nerves.

Rheumatoid Arthritis (RA) Symptoms and Complications

Rheumatoid arthritis (RA) symptoms are different for each person who has this long-term disease.

Some people have long periods with few or no symptoms. Others feel it for months at a time in an uptick of disease activity called a flare. 

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