Tags: Arthritis | arthritis | joint | pain | knees

Why Arthritis in Knees Causes So Much Pain

By    |   Tuesday, 04 August 2015 03:20 PM

Arthritis is a painful condition that causes inflammation and joint pain, and one of the more painful joints often affected is the knee.

The largest joint in the body and the strongest, the knee is where the ends of three bones meet. They are covered with cartilage, much of which acts as a "shock absorbers" between the thighbone and shinbone, according to the American Academy of Orthopedic Surgeons. The knee joint is typically well lubricated by the synovial membrane so that friction among all the moving parts is reduced.

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But when arthritis strikes the knee joint, those moving parts can be affected in numerous ways. Three primary types of arthritis affect the knee joint: osteoarthritis, rheumatoid arthritis, and posttraumatic arthritis, the AAOS said.

1. Osteoarthritis: This kind of arthritis occurs over time and is often referred to as “wear-and-tear” arthritis. “The cartilage in the knee joint gradually wears away. As the cartilage wears away, it becomes frayed and rough, and the protective space between the bones decreases,” AAOS said. “This can result in bone rubbing on bone, and produce painful bone spurs.”

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2. Rheumatoid arthritis: An autoimmune condition, rheumatoid arthritis can cause inflammation in the knee, WebMD said, typically of the synovial membrane. Medications can decrease inflammation, and doctors frequently recommend physical therapy to strengthen the knee area. In some cases, doctors may remove the inflamed membrane, which can provide relief for up to five years, the website said.

3. Post-traumatic arthritis: This arthritis occurs because of damage done by a knee injury, AAOS said. Tears and strains in the knee can cause it to develop over time.

Knee pain is common in the United States, according to WebMD. In fact, about one-third of doctor visits about bone and muscle pain have to do with knees.

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Arthritis is a painful condition that causes inflammation and joint pain, and one of the more painful joints often affected is the knee.
arthritis, joint, pain, knees
Tuesday, 04 August 2015 03:20 PM
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