Runner's knee, also known as patellofemoral pain syndrome, is a condition characterized by dull pain around the front of the knee (patella), where it connects with the lower end of the thigh bone (femur).
Runner's knee may be caused by a structural defect, or a certain way of walking or running. Other causes may include: a kneecap that is located too high in the knee joint, weak thigh muscles, tight hamstrings, tight Achilles tendons, poor foot support, excessive training or overuse.
The following are the most common symptoms of runner's knee. However, each individual may experience symptoms differently. Symptoms may include:
- Pain in and around the kneecap that may be felt with activity, or even after prolonged sitting with the knees bent, occasionally resulting in weakness or feelings of instability
- Rubbing, grinding, or clicking sound of the kneecap that can be heard at times when the knee is bent and straightened
- Kneecap is tender to the touch
