Arthritis
is inflammation of one or more joints and also involves the breakdown of
cartilage. A joint is the area where two bones meet. Cartilage normally
protects a joint, allowing it to move smoothly. Cartilage also absorbs shock
when pressure is placed on the joint, such as when you walk. Without the normal
amount of cartilage, the bones rub together, causing pain, swelling
(inflammation), and stiffness.
