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Why does my right knee make a popping sound?

Every time I walk or run I hear a little popping sound in my right knee that I can also feel. Is there something wrong with my cartilage? Can cartilage make that popping sound?
A popping sound in the knee may be a normal finding or it may be caused by a medical problem. In the normal joint, sometimes with rapid movement small bubbles form in the joint fluid and then 'pop' - this is called 'cavitation' and it leads to the cracking or popping noise. This kind of joint popping is totally normal and not a significant problem. Importantly, it is asymptomatic, so if you have any other symptoms - such as joint pain or swelling, or a catching sensation when you move the joint, then it is more likely that you have something going on and you will need to see your primary care doctor for advice and evaluation. One very common cause of knee pain together with joint 'popping' is something called patellofemoral pain syndrome, or 'runner's knee'. This is basically an overuse injury in which the cartilage on the back of the knee cap becomes roughened and 'clicks' as it glides over the bone underneath. If you are diagnosed with this condition, it can be treated with rest, strengthening exercises, and anti inflammatory medications as directed by your doctor. Make an appointment to be seen at your earliest convenience, and good luck!
This answer is for general informational purposes only and is not a substitute for professional medical advice.
If you think you may have a medical emergency, call your doctor or (in the United States) 911 immediately. Always seek the advice of your doctor before starting or changing treatment. Medical professionals who provide responses to health-related questions are intended third party beneficiaries with certain rights under ZocDoc’s Terms of Service.

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