What
are the signs and symptoms of patellofemoral syndrome?
Generalized pain around the kneecap is the most common symptom
of patellofemoral syndrome:
The patient may have a history of a dull, aching pain in the
knee, not necessarily in one specific area.
If the pain is in front of the knee below the kneecap, it is
probably caused by tendon inflammation called infrapatellar tendonitis
or "jumper's knee".
Running, going down stairs, squatting, or sitting for a long
time with knees bent usually increases pain.
Although full range of motion is usually possible, flexing
the knee completely is painful.
Crepitus (a crackling noise under the patella) may occur during
knee movement.
What
are the signs and symptoms of patellofemoral syndrome? 
