I've got a question on some knee pain I've been dealing with for some time now, 7 years to be exact. It all started with bball in gradeschool. One night after practice I noticed a sharp, knife like pain in my left knee. I thought it was only temporary, but I was wrong. It's lasted over the years, coming and going, sometimes in the the form of a dull, swollen up feeling after running or a sharp pain like I originally felt every once in a while. Now when I started squats in the fall, the problem has gotten better, but before I did squats this Friday, I felt this sharp pain again on my warmups. Wierd thing is that after my knees were warmed up the pain went away for the most part, and I was fine afterwards. It still comes and goes though...any idea what this could be from? What kind of injury is this that I've dealt with? Messed up cartilage in my knee?