I really don’t know if ligament instability is the real problem. That is what the third doc thought. First doctor did not and said neither arthroscopy nor revision would get rid of pain. He Didn’t know why it happened. He based his opinion on how my knee looks and kneecap moves. There is an area on the lateral side that is swollen and warm 24/7. Use cbd cream at night also. Have requested another opinion at university of San Francisco.