Why Does My Knee Click When I Bend It?

Knee clicking when bending typically results from tendons or ligaments moving over bone surfaces or gas bubbles releasing from synovial fluid. Most clicking is harmless and occurs when the patella (kneecap) moves slightly out of its normal groove or when the iliotibial band snaps over the lateral femoral condyle. Studies show that up to 40% of people experience some form of knee clicking without pain or functional limitations. However, clicking accompanied by pain, swelling, or instability may indicate cartilage damage, meniscus tears, or patellofemoral syndrome. The sound becomes more noticeable with age as cartilage naturally wears and joint surfaces become less smooth.

Related Questions

• Is knee clicking dangerous or harmful?

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