Institute of Sport Physio Presents the Ultimate Guide to Runner’s Knee

Runner’s Knee or Patellofemoral pain syndrome (PFPS) is characterized by a dull pain that is “behind” or “around” the top of the kneecap. It is the most common of all running ailments, accounting for 16.5% of injuries according to one recent study.

You will likely have pain when resisting leg extension, and possibly tenderness if you push against the kneecap itself - aggravating movements include squatting, running (especially downhill), descending stairs and prolonged sitting.
http://www.instituteofsport.co.nz/institute-of-sport-physio-presents-the-ultimate-guide-to-runners-knee/

Surgery Isn’t the First Option for Knee Pain

Every year, over two million people around the world opt to undergo surgery to heal knee injuries like meniscal tears. Most of them believe that surgery is the only way to achieve lasting relief from pain caused by these injuries. Unbeknownst to many of these patients, however, relatively simple treatments such as physiotherapy can be as effective in healing these injuries as surgery.