How Can I Naturally Lubricate My Joints? Wellgard Home Remedies for Knee Pain: Causes, Relief & When to See a Doctor Max Hospital Viscosupplementation: How Gel Injections Restore Your Knee's Natural Cushioning Joint Relief Institute 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 Can Exercise Make Knee Arthritis Pain Better or Worse? Total Ortho Sports Medicine