What Is Arthritis?

ARTHRITIS

What is arthritis?

Arthritis means inflammation of the joints. It causes pain and usually also limits movement of the joints that are affected. There are many kinds of arthritis, but by far the most common type is called osteoarthritis (also called degenerative joint disease).

What causes osteoarthritis?

Unfortunately the exact cause isn't known. It has been recognized however that osteoarthritis seems to run in families, so if your parents had arthritis there’s a greater chance that you may experience problems also. Osteoarthritis seems to be related to the wear and tear put on joints over the years in most people, but this wear and tear alone don't cause osteoarthritis.

What happens when a joint is affected?

Normally, a smooth layer of cartilage acts as a pad between the bones of a joint helping it to move easily and comfortably. In some people however, the cartilage becomes thinner over the years as the joints are used. This is the start of osteoarthritis. Over time, the cartilage gradually wears away and the bones may start to rub against one another.

At the points where the bones rub together, they are stimulated to grow very thick, forming something called an osteophyte, or bone spur. When this happens, bits of cartilage and bone may break away from the joint and get in the way of movement. This can cause pain, joint swelling and stiffness.

Who gets osteoarthritis?

Osteoarthritis