Adolescents with PFPS usually complain of retro-patellar pain (behind the kneecap) or peripatellar pain (around the kneecap) and crepitation in the knee joint, and also there is discomfort while sitting with a flexed knee for a long time. Symptoms are usually exacerbated by activities that increase the load on patellofemoral joints such as weight-bearing activities, squatting, walking up or downstairs, and running.~PFPS takes place whenever the muscles around the knee fail to keep the kneecap properly aligned, leading to abnormal lateral tracking of the patella.Overuse such as running and jumping sports, the trauma of kneecaps such as fracture, dislocation, or knee surgery may also predispose to PFPS.
Patellofemoral pain syndrome (PFPS) is one of the most common musculoskeletal pain conditions that tend to become a chronic problem. PFPS is common among young adolescents, particularly in physically active individuals aged 12 to 17 years old with more prevalence among females, as it affects females 1.5 - 3 times when compared to males.