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Symptoms & Conditions > Adults' > Arthritis >
About Osteoarthritis

Doctors now know that the nagging, aching pain of osteoarthritis, the most common form of arthritis, is not usually caused by inflammation. Rather, it's caused by "wear and tear" damage on the cartilage inside your joints. This damage can be the result of:

  • Sports or work injuries
  • Overuse of particular joints
  • Obesity, which puts too much pressure on weight-bearing joints
  • Hereditary factors

Painful and sometimes swollen joints in the ankles, knees, hips, elbows, hands, back or neck is called arthritis. It affects over 21 million Americans. Osteoarthritis can be caused by an injury or by excessive use of a joint, and incidence increases with age. In fact, 85 percent of the population over age 70 suffers from some form of osteoarthritis.


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Joints are amazingly well-constructed, but when you have arthritis, the joints get irritated. This can be caused by wear and tear of the cartilage, such as with osteoarthritis.

At first the cartilage becomes rough, but it can deteriorate to the point where the bones begin to rub against each other. The bones may even begin to form lumps. Each of these stages can cause pain.

Since osteoarthritis is primarily a problem of pain and not inflammation, medical experts recommend that pain relief be the primary goal of drug therapy.


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