I feel either it can be Osteoarthritis, Ligament damage
, or Patello-femoral disorder.
pain has many causes, including pathologic processes in the knee and disorders in distant locations with referral to the knee area.
Can you tell me when this pain is more? Do you experience any grinding, locking, catching, or giving way of the knee? When did your pain begin, what were you doing at the time, and what were the initial symptoms?