Being overweight or obese increases stress on your knee joints, even during ordinary activities such as walking or going up and down stairs. Risk factorsĪ number of factors can increase your risk of having knee problems, including: It's common in athletes in young adults, especially those whose kneecap doesn't track properly in its groove and in older adults, who usually develop the condition as a result of arthritis of the kneecap. Patellofemoral pain syndrome is a general term that refers to pain arising between the kneecap and the underlying thighbone. If you have knee pain with any of the symptoms of septic arthritis, see your doctor right away. Septic arthritis can quickly cause extensive damage to the knee cartilage. Septic arthritis often occurs with a fever, and there's usually no trauma before the onset of pain. Sometimes your knee joint can become infected, leading to swelling, pain and redness. Knees are the most common joint affected by pseudogout. Often mistaken for gout, pseudogout is caused by calcium-containing crystals that develop in the joint fluid. While gout most commonly affects the big toe, it can also occur in the knee. This type of arthritis occurs when uric acid crystals build up in the joint. Although rheumatoid arthritis is a chronic disease, it tends to vary in severity and may even come and go. The most debilitating form of arthritis, rheumatoid arthritis is an autoimmune condition that can affect almost any joint in your body, including your knees.
It's a wear-and-tear condition that occurs when the cartilage in your knee deteriorates with use and age. Sometimes called degenerative arthritis, osteoarthritis is the most common type of arthritis. The varieties most likely to affect the knee include: More than 100 different types of arthritis exist. But this altered gait can place more stress on your knee joint and cause knee pain. If you have hip or foot pain, you may change the way you walk to spare your painful joint. In some cases, the kneecap may stay displaced and you'll be able to see the dislocation. This occurs when the triangular bone that covers the front of your knee (patella) slips out of place, usually to the outside of your knee. Distance runners and cyclists are especially susceptible to iliotibial band syndrome. This occurs when the tough band of tissue that extends from the outside of your hip to the outside of your knee (iliotibial band) becomes so tight that it rubs against the outer portion of your thighbone. This may not create any problems unless the loose body interferes with knee joint movement, in which case the effect is something like a pencil caught in a door hinge. Sometimes injury or degeneration of bone or cartilage can cause a piece of bone or cartilage to break off and float in the joint space. Some examples of mechanical problems that can cause knee pain include: Runners, skiers, cyclists, and those involved in jumping sports and activities may develop patellar tendinitis. This inflammation can happen when there's an injury to the patellar tendon, which runs from the kneecap (patella) to the shinbone and allows you to kick, run and jump. Tendinitis causes irritation and inflammation of one or more tendons - the thick, fibrous tissues that attach muscles to bones. Some knee injuries cause inflammation in the bursae, the small sacs of fluid that cushion the outside of your knee joint so that tendons and ligaments glide smoothly over the joint. It can be torn if you suddenly twist your knee while bearing weight on it. The meniscus is the tough, rubbery cartilage that acts as a shock absorber between your shinbone and thighbone. Also, people whose bones have been weakened by osteoporosis can sometimes sustain a knee fracture simply by stepping wrong.
The bones of the knee, including the kneecap (patella), can be broken during falls or auto accidents. An ACL injury is particularly common in people who play basketball, soccer or other sports that require sudden changes in direction. An ACL injury is a tear of the anterior cruciate ligament (ACL) - one of four ligaments that connect your shinbone to your thighbone. Some of the more common knee injuries include: It can be torn if you suddenly twist your knee while bearing weight on it.Ī knee injury can affect any of the ligaments, tendons or fluid-filled sacs (bursae) that surround your knee joint as well as the bones, cartilage and ligaments that form the joint itself.
The meniscus is a C-shaped piece of tough, rubbery cartilage that acts as a shock absorber between the shinbone and the thighbone.
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