Do knees always have some fluid to lubricate the joints?when i touch my knees,don't feel the fluid.after a fall on my knees,i felt liquid.what was it?

Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Never disregard or delay professional medical advice in person because of anything on HealthTap. Call your doctor or 911 if you think you may have a medical emergency.