Patellofemoral pain syndrome (PFPS) is a common presentation in physiotherapy and sports medicine practices. It is particularly prevalent in runners, and females tend to be affected more frequently than males. The onset of PFPS is often insidious. Patients describe a diffuse ache in the front knee which is often difficult to localise. Clicking or noise is often experienced. The pain is aggravated by loading activities, such as squatting, kneeling and walking up or downstairs. There may be tenderness and swelling around the kneecap.