Osteoarthritis (OA) is the most common form of arthritis. Some people call it degenerative joint disease or “wear and tear” arthritis. It occurs most frequently in the hands, hips, and knees.
With OA, the cartilage within a joint begins to break down and the underlying bone begins to change. These changes usually develop slowly and get worse over time. OA can cause pain, stiffness, and swelling. In some cases it also causes reduced function and disability; some people are no longer able to do daily tasks or work.
What are the signs and symptoms of OA?
- Pain or aching
- Decreased range of motion (or flexibility)
How many people have OA?
OA affects over 32.5 million US adults.
What causes OA?
OA is caused by damage or breakdown of joint cartilage between bones.
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