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Why Does My Knee Keep Popping?

Medically reviewed by Cara Beth Lee, MDKey TakeawaysKnee popping can be harmless and caused by air bubbles in the joint.Knee ...
Knee clicking is common and often harmless, caused by gas bubbles or tendons moving over bone. However, when accompanied by pain, swelling, or instability, it can signal a meniscus tear or arthritis.