Fluid injection to help lubricate your knee, to prevent knee pain and osteoarthritis NAKORNTHON HOSPITAL Natural Joint Lubrication: How to Keep Your Joints Healthy Liv Hospital The knee normally contains a small amount of fluid that helps lubricate the joint and allow smooth movement. Problems begin when the knee starts producing too much fluid. This excess fluid is Ever wondered how our joints move so smoothly without friction?, This is Hyaluronic Acid a natural substance found in our body that works like a powerful lubricant for joints, eyes, and skin! ,