U.S. doctors online nowAsk doctors free
CA
A 27-year-old member asked:

When they say an injured athlete had fluid drained from a swollen joint such as the knee, what is this fluid?

2 doctor answers3 doctors weighed in
Dr. Frank Holmes
Sports Medicine 24 years experience
Synovial fluid: Usually this is synovial fluid. Synovial fluid's job is to lubricate and protect the joint. In the presence of injury, inflammation or infection, the synovial lining (part of the joint capsule), overcompensates by producing an excess amount of synovial fluid. Too much fluid can cause pain and tightness in the joint and restrict range of motion. With an acute injury, blood may also fill the joint.
Created for people with ongoing healthcare needs but benefits everyone.
Dr. John Goldman
Rheumatology 56 years experience
Synovial fluid: This fluid is produced by the knee to help cushion it. We all have joint fluid but depending on what type of arthritis one has can depend on the internal fluid that is there.
Created for people with ongoing healthcare needs but benefits everyone.
Last updated Nov 9, 2012

Disclaimer:

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.