Rheumatoid arthritis (RA) is an autoimmune disease that causes chronic inflammation of the joints. Rheumatoid arthritis can also cause inflammation of the tissue around the joints, as well as in other organs in the body. Autoimmune diseases are illnesses that occur when the body's tissues are mistakenly attacked by their own immune system. Rheumatoid arthritis (RA) is a chronic, systemic inflammatory disorder that may affect many tissues and organs, but principally attacks synovial joints. The synovial joints, also known as diarthroses, comprise most of the joints in the human body. These movable joints, or articulations, are named for their structure, which consists of connective tissue and secreted fluid that hold together the bones while allowing smooth movement. Although the cause of rheumatoid arthritis is unknown, autoimmunity plays a pivotal role in both its chronicity and progression. Get back to the pain free life you deserve.