Patellofemoral pain syndrome (PFPS) also known as runner’s knees or biker’s knee is the most common cause of anterior knee pain syndrome. This syndrome is due to an overuse injury caused by repeated insults and micro-trauma which leads to softening of the cartilage under the kneecap (patella). The pain tends to worsen when you are active or sit for prolonged periods of time and can affect one or both knees.
EVALUATING YOUR CONDITION
What causes patellofemoral syndrome?
Patellofemoral pain syndrome (PFPS) is often seen among athletes, young adolescents and manual laborers. Recurrent knee cap (patella) subluxation or tracking issues is the crux of this syndrome. Overuse injury and excess weight can further contribute to improper alignment of the knee cap. Weakness and muscle imbalance in the quadriceps muscles (vastus medialis and lateralis) can cause tracking issues of the patella as can tightness in the hip flexors, abductors and hamstrings. Activities like ascending or descending stairs can aggravate the condition.
What are the symptoms of patellofemoral syndrome?
- Swelling and effusion
- Crepitus (cracking of the joint) upon range of motion
- Grinding, catching, and popping sensation
- Knee buckling