Osteoarthritis of the Knee is a condition in which cartilage, which acts as cushioning between your joints, wears away, primarily through wear and tear. It is primarily a function of age, but younger people can also experience it. The key symptoms are pain, swelling, stiffness, and a decreased ability to move. The resulting pain and functional degradation can be managed by losing weight, strengthing the muscles of the leg, taking anti-inflammatories, and the use of a knee brace.