I ve been experiencing weakness in the back of my knees for months and it s getting worse. Due to this I am having balance issues, falling and not able to get up when kneeling. It also feels like there s pressure on the back of both knees as if I were using a blood pressure machine. What could be causing this. I m worried because this is getting worse. N. McCullough
In arthritis generally you will get pain during night. And increase with activity. And you will have local rise of temperature and mild swelling in initial stages.