Knee Pain

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Knee pain can be a result of injury or disease of the knee joint. Injury can affect any of the ligaments, bursae, or tendons surrounding the knee joint. Injury can also affect the ligaments, cartilage, menisci (plural for meniscus), and bones within the joint. The complexity of the design of the knee joint and the fact that it is an active weight-bearing joint are factors in making the knee one of the most commonly injured joints.

Pain can also occur in the knee from diseases or conditions that involve the knee joint, the soft tissues and bones surrounding the knee, or the nerves that supply sensation to the knee area. In fact, the knee joint is the most commonly involved joint in rheumatic diseases, including rheumatoid arthritis, reactive arthritis, systemic lupus erythematosus, as well as osteoarthritis. Diseases that cause knee pain can lead to swelling, redness, warmth, weakness, instability, tenderness, and stiffness of the joint. Many of the symptoms of knee pain can be a result of an excess of fluid forming in the joint.

Medically Reviewed by a Doctor on 2/24/2012

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Fauci, Anthony S., et al. Harrison's Principles of Internal Medicine. 17th ed. United States: McGraw-Hill Professional, 2008.

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