The knee is a modified hinge joint, which permits flexion and extension as well as slight internal and external rotation. Visit a healthcare provider if you’ve experienced an injury or have knee pain for more than a few days in a row. Medical conditions — including arthritis, gout and infections — also can cause knee pain. It may start suddenly, often after an injury or exercise. · knee pain is a common symptom in people of all ages. The tibia is then in the position of maximal stability with respect to the femur. Knee pain also may begin as a mild discomfort, then slowly get worse. You can usually treat knee pain at home with rest and over-the-counter medicine. · knee pain can result from injury, arthritis, or overuse. Lots of issue can cause it. The knee is a hinge joint that is formed by the meeting of the thigh bone (femur) and the larger bone (tibia) of the lower leg. · knee pain knee pain is an extremely common symptom. In humans, it is the largest joint in the body. · the knee is the largest and most complex joint in the body, holding together the thigh bone, shin bone, fibula (on the outer side of the shin), and kneecap. · do you have knee pain? External rotation occurs during the terminal degrees of knee extension and results in the tightening of both cruciate ligaments, which locks the knee. Learn about the common causes, based on the location of the pain, and when you should see a doctor about your pain. Learn about its causes, symptoms, and treatment options. It may be a temporary injury or chronic condition like arthritis. Three bones come together in the knee joint: · the knee joint is a complex structure that involves bones, tendons, ligaments, and muscles for normal function. The tibia, femur, and patella. · knee pain may be the result of an injury, such as a ruptured ligament or torn cartilage. The knee is vulnerable to injury and to the development of osteoarthritis.