Knee aspiration, also known as joint drainage, is a procedure used to remove built-up fluid from the knee joint.A thin needle is carefully inserted to draw out the fluid, helping reduce swelling, relieve pain, and improve mobility.This procedure is often done for arthritis, injuries, or unexplained joint effusion, and can also be used to test the fluid for underlying conditions. #kneepain #painmanagement #painrelief | Precision Care Medical & Sports Performance