The hand and wrist have multiple small joints that work together to produce motion, including the fine motion needed to thread a needle or tie a shoelace. When the joints are affected by arthritis, activities of daily living can be difficult. Arthritis can occur in many areas of the hand and wrist and can have more than one cause.
Simply defined, arthritis is inflammation of one or more of your joints. The most common types of arthritis are osteoarthritis and rheumatoid arthritis, but there are more than 100 different forms.
Healthy joints move easily because of a smooth, slippery tissue called articular cartilage. Cartilage covers the ends of bones and provides a smooth gliding surface for the joint. This smooth surface is lubricated by a fluid that looks and feels like oil. It is produced by the joint lining called synovium.
When arthritis occurs due to disease, the onset of symptoms is gradual and the cartilage decreases slowly. The two most common forms of arthritis from disease are osteoarthritis and rheumatoid arthritis.
Osteoarthritis is much more common and generally affects older people. Also known as “wear and tear” arthritis, osteoarthritis causes cartilage to wear away. It appears in a predictable pattern in certain joints.
Rheumatoid arthritis is a chronic disease that can affect many parts of your body. It causes the joint lining (synovium) to swell, which causes pain and stiffness in the joint. Rheumatoid arthritis most often starts in the small joints of the hands and feet. It usually affects the same joints on both sides of the body.
Fractures, particularly those that damage the joint surface, and dislocations are among the most common injuries that lead to arthritis. Even when properly treated, an injured joint is more likely to become arthritic over time
Information provided by orthoinfo.aaos.org