Arthritis is a general term for a group of more than 100 diseases. The word "arthritis" means "joint inflammation." Arthritis involves inflammation and swelling in and around the body's joints and surrounding soft tissue. This inflammation can cause pain and stiffness.

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In many kinds of arthritis, progressive joint deterioration occurs and the smooth "cushioning" cartilage in joints is gradually lost. As a result, the bones rub and wear against each other. Soft tissues in the joints also may begin to wear down. Arthritis can be painful and eventually result in limited motion, loss of joint function, and deformities in the joints affected

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The most common form of ankle arthritis is osteoarthritis. For more information on this topic, read the Osteoarthritis page.

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Similar symptoms may be caused by another form of arthritis, rheumatoid arthritis.