I talked about arthritis is past post as a cause of a problem but I haven't really explained what it is. Arthritis usually begins with a break down of cartilage in the joints. Cartilage allows the bones to move smoothly together and it also absorbs some of pressure on the joints when one is walking or lifting something. When this cartilage is worn, the bone begin to have direct contact with the other bone involved in the joint which causes inflammation, pain and stiffness. In response to this new pressure and irritation the body will sometimes grow new bone in attempts to lessen the pressure. Unfortunately it usually hurts more than helps, as was seen with spinal stenosis and how these bone spurs can put pressure on nerves.
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