Patellofemoral pain syndrome usually causes a dull, aching pain in the front of the knee. The following can increase the pain:  Walking up or down stairs. Kneeling or squatting. Sitting with a bent knee for long periods of time.  When to see your doctor If the knee pain doesn't improve within a few days or it gets harder to move the knee, call your health care provider.
patellofemoral pain syndrome causes dull  aching pain front knee  following can increase pain:  walking down stairs  kneeling squatting  sitting bent knee long periods time   see doctor knee pain doesn't improve days harder move knee  call health care provider
patellofemoral pain syndrome