• Conditions InDepth: Rheumatoid Arthritis

    Rheumatoid arthritis (RA) is a common inflammatory disease that affects connective tissue throughout the body. The most common areas affected are the joints. A joint is the location where bones come together. Several structures work together to allow movement of the joint:
    • Synovium—A capsule that surrounds and protects the joint. The tissue also produces a fluid that helps lubricate and protect the joint.
    • Cartilage—Soft tissue that covers the ends of the bone to allow the bones to glide over each other smoothly.
    • Tendons—Strong tissue that connects muscle to bone near the joint. The tendons cross over joints and are critical to allowing movement.
    RA is inflammation of the synovium which causes swelling and tenderness in joints. RA symptoms and severity can vary significantly between people. Some may have mild symptoms over a short period of time and some may have more severe forms that lasts many years. RA may also occur in cycles of remission with no symptoms and flare ups where symptoms are more severe.
    Over the course of time, inflammation can cause irreversible damage to the cartilage and bone, and weaken nearby tendons which can lead to disability. The earlier RA is detected and treated, the better it can be controlled and damage can be minimized.
    Rheumatoid Arthritis
    Copyright © Nucleus Medical Media, Inc.
    Although less common, RA can also affect connective tissue in other areas of the body including:
    • The lungs and the lining that surrounds them
    • The heart and the lining that surrounds it
    • Artery walls
    • Skin
    • The whites of the eyes—sclera


    RA is an autoimmune disease. The immune system is designed to attack foreign substances in the body such as viruses or bacteria. With an autoimmune disorder, the immune system mistakenly identifies healthy body tissue as foreign tissue and attacks it. In RA, the joint tissue is attacked. This attack causes irritation and swelling in the synovium and a thickening of the fluid in the joint which causes the hallmark redness, swelling, and stiffness of the joints. Over time, this constant inflammation wears away at the cartilage and bone inside the joint, and makes the nearby tendons weak, making movement painful and difficult.
    The exact cause of autoimmune disorders like RA is not known, but is believed to be a combination of:
    • Genetic factors—faulty genes may redirect immune system to attack specific healthy tissue
    • Environmental factors—may trigger gene defect and/or cause change in immune system
    • Chemical or hormonal imbalances in the body
    What are the risk factors for rheumatoid arthritis?What are the symptoms of rheumatoid arthritis?How is rheumatoid arthritis diagnosed?What are the treatments for rheumatoid arthritis?Are there screening tests for rheumatoid arthritis?How can I reduce my risk of rheumatoid arthritis?What questions should I ask my doctor?What is it like to live with rheumatoid arthritis?Where can I get more information about rheumatoid arthritis?


    Handout on health: Rheumatoid arthritis. National Institute of Arthritis and Musculoskeletal and Skin Diseases website. Available at: http://www.niams.nih.gov/Health%5FInfo/Rheumatic%5FDisease/default.asp. Updated August 2014. Accessed October 29, 2014.

    Rheumatoid arthritis. Arthritis Foundation website. Available at: http://www.arthritis.org/conditions-treatments/disease-center/rheumatoid-arthritis. October 29, 2014.

    Rheumatoid arthritis. The Merck Manual Professional Edition website. Available at: http://www.merckmanuals.com/professional/musculoskeletal%5Fand%5Fconnective%5Ftissue%5Fdisorders/joint%5Fdisorders/rheumatoid%5Farthritis%5Fra.html. Updated May 2013. Accessed October 29, 2014.

    Rheumatoid arthritis (RA). EBSCO DynaMed website. Available at: http://www.ebscohost.com/dynamed. Updated April 10, 2014. Accessed October 29, 2014.

    Wasserman AM. Diagnosis and management of rheumatoid arthritis. Am Fam Physician. 2011;84(11):1245-1252.

    Revision Information

  • LiveWell personal health survey

    How healthy are you really? Find out – free.Learn more

    It's time to stop guessing. If you want to make some changes but just aren't sure how, the free personal health survey from LiveWell is a great place to start.

  • HeartSHAPE Spotlight

    At risk for a heart attack? Learn more

    Fight heart disease and prevent heart attacks. HeartSHAPE® is a painless, non-invasive test that checks pictures of your heart for early-stage coronary disease.

  • Calories and Energy Needs

    Calorie NeedsLearn more

    How many calories do you need to eat each day to maintain your weight and fuel your physical activity? Enter a few of your stats into this calculator to find out.

  • Ideal Body Weight

    Ideal Body WeightLearn more

    Using body mass index as a reference, this calculator determines your ideal body weight range. All you need to do is enter your height.

  • Body Mass Index

    Body Mass IndexLearn more

    This tool considers your height and weight to assess your weight status.

  • Can we help answer your questions?

    Wellmont Nurse Connection is your resource for valuable health information any time, 24 hours a day, seven days a week. Speak to a Nurse any time, day or night, at (423) 723-6877 or toll-free at 1-877-230-NURSE.