5 years i've felt a constant burning (sometimes stabbing) pain which is mainly behind my knee
cap, and at the top of the knee
cap (where the thigh meets the knee
), it also clicks and somedays feels very stiff. this pain fluctuates every day, and some days it will feel almost fine, some days i will be in agony, both of which sometimes stick around for months. excercise is STILL extremely difficult due to pain levels and my knee sometimes locking up.