It only occurs when I have weight on it as it’s bent e.g. standing next to a chair and place my knee on the seat and put weight on it. The pain is like an 8/10 and immediately stops when I straighten it. It doesn’t occur any other time. There is no swelling or any other outward signs that there is a problem. Until I bend it and put weight on it I forget that I even have an issue. Today when making the bed I brought my leg up onto the bed and reached over for a pillow and the pain brought me back to reality and to searching on the web for a possible reason as to why it is happening.