Osteoarthritis, also called degenerative arthritis, is a degenerative condition that commonly affects the small joints of the fingers and the base of the thumb. Common in both men and women, it can cause the joints to become swollen, stiff and painful. It often leads to joint enlargement, interfering with normal hand function and significantly impacting a person's quality of life. There are two main types of hand arthritis: primary generalized osteoarthritis and erosive osteoarthritis, and they affect the hands differently.

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