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Patellofemoral Pain Syndrome

Topic Overview

What is patellofemoral pain syndrome?

Patellofemoral pain syndrome is pain in the front of the knee. It frequently occurs in teenagers, manual laborers, and athletes. It sometimes is caused by wearing down, roughening, or softening of the cartilage under the kneecap.

What causes patellofemoral pain syndrome?

Patellofemoral pain syndrome may be caused by overuse, injury, excess weight, a kneecap that is not properly aligned (patellar tracking disorder), or changes under the kneecap.

What are the symptoms?

The main symptom of patellofemoral pain syndrome is knee pain, especially when you are sitting with bent knees, squatting, jumping, or using the stairs (especially going down stairs). You may also experience occasional knee buckling, in which the knee suddenly and unexpectedly gives way and does not support your body weight. It is also common to have a catching, popping, or grinding sensation when you are walking or when you are moving your knee.

How is patellofemoral pain syndrome diagnosed?

Your doctor will conduct a medical history and physical exam to determine the cause of your pain. In some cases, imaging tests including X-rays or magnetic resonance imaging(MRI) may be done. These tests allow a doctor to view the tissues inside your knee to rule out damage to the structure of the knee and the tissues connected to it.

How is it treated?

Patellofemoral pain syndrome can be relieved by avoiding activities that make symptoms worse.

  • Avoid sitting, squatting, or kneeling in the bent-knee position for long periods of time.
  • Adjust a bicycle or exercise bike so that the resistance is not too great and the seat is at an appropriate height. The rider should be able to spin the pedals of an exercise bike without shifting weight from side to side. And the rider's legs should not be fully extended at the lowest part of the pedal stroke.
  • Avoid bent-knee exercises, such as squats or deep knee bends.

Other methods to relieve pain include:

  • Taking nonprescription anti-inflammatory drugs (NSAIDs), such as ibuprofen or naproxen, to decrease swelling, stiffness, and pain. Be safe with medicines. Read and follow all instructions on the label.
  • Ice and rest. You can also try heat to see if it helps.
  • Physical therapy exercises. Exercises may include stretching to increase flexibility and decrease tightness around the knee, and straight-leg raises and other exercises to strengthen the quadriceps muscle.
  • Taping or using a brace to stabilize the kneecap.
  • Surgery.

References

Other Works Consulted

  • Callaghan MJ, Selfe J (2012). Patellar taping for patellofemoral pain syndrome in adults. Cochrane Database of Systematic Reviews (4).
  • Earl JE, Vetter CS (2007). Patellofemoral pain. Physical Medicine and Rehabilitation Clinics of North America, 18(2007): 439-458.
  • Grudziak JS, Musahl V (2007). The youth athlete. In PJ McMahon, ed., Current Diagnosis and Treatment in Sports Medicine, pp. 194-256. New York: McGraw-Hill.

Credits

ByHealthwise Staff
Primary Medical ReviewerWilliam H. Blahd, Jr., MD, FACEP - Emergency Medicine
Kathleen Romito, MD - Family Medicine
E. Gregory Thompson, MD - Internal Medicine
Adam Husney, MD - Family Medicine
Specialist Medical ReviewerPatrick J. McMahon, MD - Orthopedic Surgery, Sports Medicine

Current as ofNovember 29, 2017


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