On the 19th I had a arthroscopy they went in and they clipped out my Meniscus and then shave down the rest of it to where it is now all even I was born with a flat meniscus which makes it more prone to tearing. If you are experiencing pain in your knee grinding popping I suggest that you go have a arthrogram done and have them check out your knee. Do not push it do not Bend do not run do not over stimulate your knee here are a couple photos from when they clipped out my meniscus. Sometimes it's just better to do exactly what the doctors tell you and stay off of it.
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From @brookegaynor