or for that matter, any mechanical pains are caused by analysis of physical stress
acted upon the tissue vs strength of the tissue. If tissue strength is greater than the physical stress acted upon it, then there won't be any injury. First, one should analyse, in activity of daily life, which part of the joint you r stressing. Then one should analyse, is that part strong enough to take the stress. If stress is greater than strength, then there will be injury, then pain
n disuse stiffness as well as dususe weakness. Therefore, you will be under vicious cycle. To take out stiffness, pain n weakess, consult physiotherapist
. Then, try to strengthen your knee according to your physical stree to prevent recurrence.