Outer Side of Knee Pain
Knee pain affects one of three Americans older than the age of 45, according to the Mayo Clinic. A common cause of knee pain is an injury to the knee. In other cases, knee pain results from medical conditions.
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Ligament Injury
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A lateral collateral ligament injury causes immediate pain that gets worse as you walk or bend the knee. A tear to this ligament may result from a fall or a direct blow to the knee.
Tendon Injury
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Knee pain caused by a tendon injury, or tendonitis, is especially common in athletes such as runners, skiers and cyclists. Often the pain worsens during jumping, running or climbing stairs.
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Meniscus Injury
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Knee pain due to a meniscus injury, or a tear of the cartilage, can be mild to moderate and may include swelling or the feeling that the knee is locked in place.
Bursitis
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Bursitis, according to the Mayo Clinic, can be a result of a direct blow to the knee, frequent falls, bacteria, complications from rheumatoid arthritis, osteoarthritis, or gout. Bursitis can cause swelling, redness, stiffness and fever as the kneecap becomes infected.
Osteoarthritis
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Osteoarthritis, deterioration of the cartilage with age, is another cause of knee pain. Signs of osteoarthritis include various degrees of pain, swelling and a creaking or popping sound.
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