I was born with discoid meniscus and as a result had two meniscus repairs due to knee instability the infamous popping associated with the disorder. In my left knee, I still get severe pain years later. It happens randomly but can also arise with overuse. Moving my knee becomes near unbearable let alone tasks like walking. It normally lasts a few hours to a few days then go away as if it never happened. Overtime, it's been getting more frequent, more painful, and lasting longer.