Joint fluid fills the small space between the ends of bones and acts like a natural lubricant. The synovial membrane creates this thick, silky fluid using long molecules that hold water and give it a Home Remedies for Knee Pain: Causes, Relief & When to See a Doctor Max Hospital How Can I Naturally Lubricate My Joints? Wellgard Knee Injections: Your Path to Pain Free Mobility Peter Howard Diagram of the presence of lubricin in the SF of the healthy knee joint Download Scientific Diagram 9 At Home Treatments for Arthritis Knee Pain