Contents
Knee Effusion: Why Is Your Knee Swollen and What Can You Do About It?
Published: May 05, 2024
Knee effusion, or fluid buildup in the knee joint, can be a sign of various conditions. Understanding its causes and detection can lead to proper treatment.
What Causes Knee Effusion?
Knee effusion can result from injury, arthritis, or infection. Common causes include meniscus tears, ligament injuries, and osteoarthritis. In some cases, it may be due to gout or rheumatoid arthritis. Identifying the underlying cause is crucial for effective treatment.
How Do Doctors Detect Knee Effusion?
Doctors use several techniques to check for knee effusion. They may look for a visible bulge or swelling around the knee. The 'ballottement test' involves pressing on the kneecap to feel for fluid movement. In some cases, ultrasound may be used for more accurate detection.
Treatment Options for Knee Effusion
Treatment depends on the underlying cause. Rest, ice, and elevation can help reduce swelling. Anti-inflammatory medications may be prescribed. In some cases, draining the fluid (aspiration) might be necessary. Physical therapy can help strengthen the knee and prevent future effusions.
Frequently Asked Questions
Not always, but it often causes discomfort and limits movement.
Minor cases may resolve with rest, but persistent swelling needs medical attention.
Recovery time varies from days to weeks, depending on the cause.
Gentle exercises can help, but consult a doctor first.
'Water on the knee' is a common term for knee effusion.
Key Takeaways
Knee effusion is a common problem with various causes, and proper diagnosis is key to effective treatment.
References
- Hauzeur JP, et al. Comparison between clinical evaluation and ultrasonography in detecting hydrarthrosis of the knee. J Rheumatol 1999; 26:2681.
- Hong BY, et al. Detectable threshold of knee effusion by ultrasonography in osteoarthritis patients. Am J Phys Med Rehabil 2011; 90:112.
- Kane D, et al. Ultrasonography is superior to clinical examination in the detection and localization of knee joint effusion in rheumatoid arthritis. J Rheumatol 2003; 30:966.
This article has been reviewed for accuracy by one of the licensed medical doctors working for Doctronic. Always discuss health information with your healthcare provider.
AI Doctor Visit Required
Appointments available 24/7
Top licensed doctors
Available in all 50 states
Full service care
Prescriptions, referrals & treatment
No insurance needed
All notes available in Doctronic
15-min consultation. No hidden costs.
AI Doctor Visit Required
Please Chat With Our AI Doctor First
Our AI doctor assessment helps our human doctors prepare for your video visit and provide better care
For safety reasons we have been forced to end this consultation.
If you believe this is a medical emergency please call 911 or your local emergency services immediately.
If you are experiencing emotional distress, please call the the Suicide & Crisis Lifeline at 988 or your local crisis services immediately.
Contact us
You can also email us at help@doctronic.ai
We aim to reply within 5-7 days
How likely are you to recommend Doctronic to friends or family?