Synovitis of the knee occurs when the synovium, the connective tissue that lines the joint space, becomes inflamed. Synovium, or the synovial membrane, is a soft tissue that covers the joint cavity and nearby tendons. The synovium produces synovial fluid, the liquid that helps reduce joint friction and helps to cushion the bone ends. Synovitis of the knee occurs when the synovial membrane becomes irritated and swells, causing discomfort or pain during joint movement. This condition may be caused by an underlying condition, such as arthritis, or by overuse of the joint. Overuse synovitis of the knee is seen most frequently in athletes or individuals with high-action activities or jobs. Dr. Riley J. Williams, an orthopedic knee specialist, is extremely experienced in diagnosing and treating patients with synovitis in the knee. He can help patients in Manhattan, Brooklyn, New York City, NY and surrounding areas recover from synovitis of the knee.