👉 Knee fluid, also known as synovial fluid, is a vital component of the knee joint that serves to lubricate and nourish the cartilage, reducing friction between the bones during movement. It is produced by the synovial membrane lining the joint capsule and is composed primarily of water, hyaluronic acid, proteins, and other substances that help maintain the joint's smooth operation. Under normal conditions, this fluid is contained within the joint cavity and is expelled during activities that cause movement. However, when there is an injury or inflammation in the knee, excess fluid can accumulate, leading to conditions like knee effusion, which may cause swelling and discomfort.
