ALFRED PASIEKA / SCIENCE PHOTO LIBRARY ALFRED PASIEKA / SCIENCE PHOTO LIBRARY
Arthritic elbow. Computer artwork of an arthritic elbow joint (centre). The area of pain and inflammation is shown in red. The elbow joint is where the humerus (upper arm bone, top) joins with the two lower arm bones, the ulna (bottom right) and radius (bottom left). Arthritis is a degenerative disease that causes the loss of the protective cartilage between joints. There are many types of arthritis. The two most common are rheumatoid arthritis, in which the body's immune system attacks the joint's soft tissues, and osteoarthritis, which is caused by wear and tear. Both cause pain and stiffness. Treatment is with anti-inflammatory drugs and, in severe cases, surgical elbow replacement.
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