Your bones hang out in a lot of joints. Knee joints. Hip joints. The joints in your fingers and the joints in your toes.
Wherever bones meet, there is also cartilage, a rubbery, protective layer that ensures your joints bend smoothly and painlessly. But even cartilage cannot do this tremendous job alone. A thin membrane called the “synovium” provides fluid that lubricates the moving parts of the joint. When the cartilage wears out of the synovium becomes inflamed, the result is generally a case of “osteoarthritis” or “rheumatoid arthritis.”
In osteoarthritis, the cartilage can be eroded so much that bone does rub on bone. Thos type of arthritis develops gradually over a lifetime as a simple result of the wear and tear placed on your joints over the years. Very few people escape some degree of osteoarthritis, though the severity varies a great deal.
As a matter of fact, if you are over the age of 50, you are likely to have at least one joint affected by osteoarthritis. Osteoarthritis affects men and women equally and is by far the most common type of arthritis, with almost 16 million Americans in the list.
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