Video

Knee locking: why it happens suddenly

About this video

Last updated: 9 October 2026

The video says knee locking is a specific symptom that usually points to a mechanical issue rather than just inflammation. It says sudden locking is often due to a loose body or a displaced meniscus fragment. The video says this pattern is not stiffness but a mechanical block.

Key points

  • It describes movement stopping at a very specific point and then returning once the obstruction shifts.
  • It says each time this happens the joint surfaces are being irritated, and that while symptoms may come and go the underlying issue usually persists.
  • In the meantime it says to avoid forcing through the lock and to focus on controlled, comfortable movement.

Questions this video answers

What is a mechanical block in the knee?

The video describes it as movement that stops at a very specific point and then returns once the obstruction shifts. It says this is not stiffness, and that it is often due to a loose body or a displaced meniscus fragment.

What does the video suggest when the knee locks?

It says to avoid forcing through the lock and to focus on controlled, comfortable movement. It says a proper assessment helps because understanding what is moving inside the joint guides what needs to be done next.

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