Direct Answer
What causes knee swelling?
Knee swelling can come from injury, arthritis, meniscus tears, ligament injuries, overuse, inflammation, or other joint problems that need evaluation.
What To Know
Review the key points below, then use the related pages to explore care options.
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01
Common causes
Knee concerns include arthritis, ligament injuries, meniscus tears, traumatic arthritis, stiffness, weakness, and patellar fractures.
02
When to seek care
Evaluation is important when swelling is sudden, persistent, painful, follows an injury, or limits walking, work, sports, or stairs.
Your surgeon or care team can confirm what applies to your situation.
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