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 How To Increase Knee Lubrication? How to Lighten Dark Knees: Home Remedies, Lotions, & More If your knees feel a little stiff, try these three gentle moves. Theyre simple, gentle, and help everything glide a little smoother. Small motions support circulation and make everyday movement feel