Why do my knees pop? Is it bad for them?

The popping symptoms or snapping of you knee can be a sign of a few different problems. But I think you should not be all too worried about it since you did not mention any pain. Snapping or popping of your knee that is not associated with painful symptoms means there is no significant problem.

There are people who experience popping. This may feel like something is caught within the knee as the knee bends back and forth. This is also referred as "mechanical popping".

This symptom is often a sign that there is a meniscus tear or there is a loose piece of cartilage within the join cavity. This torn meniscus may catch the knee as it bends and straightens causing popping sensation. Crepitus is a crunching sensation as the knee is bend and straightens.

This is often observed on patients who have cartilage tear like those with chondromalacia patella and arthritis of the knee. This can be felt easily than heard. Try to watch this video for more information about knee popping.

I'm not sure what causes it, but I have the same issue and have always heard from physical therapists and trainers that it's not a problem as long as there's not pain associated with the popping. One thing that lessened it for me was to start doing full depth squats. I think that strengthening the muscles in my legs helps to keep the joints in better position and lessened the cracking.

Joint popping is common, especially in the knees, ankles, back, neck and knuckles. Suddenly standing from a seated position can cause the popping sound in the joint. Stetching or extending the leg from a flexed position can also cause the noise.

Patella (knee cap) misalignment or the movement of the ligaments across the joint is one cause of knee popping sounds. Ligaments many times move against the bones of the joint which pop when going back into natural position after being stretched. If there is pain associated with the popping noise, it's a sign of joint injury, a tear in the cartiledge in the knee or a degenerative condition.

Pain that coincides with the popping sound may be a sign of arthritis. If there is no pain with the popping noise then there is no cause for concern.

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