What is a common symptom of patellofemoral syndrome?

Patellofemoral syndrome commonly presents with knee swelling after exercise due to the increased stress placed on the patella within the knee joint during physical activity. As the knee flexes and extends, particularly in activities such as running, jumping, or squatting, it can lead to irritation of the soft tissues surrounding the patellofemoral joint. This irritation can cause inflammation, which in turn results in swelling. The combination of mechanical stress and inflammation is a hallmark of this condition, making knee swelling a significant indicator for those experiencing patellofemoral syndrome.

Other options relate to different issues or joints. For example, pain during ankle dorsiflexion generally indicates potential ankle or tibial problems rather than issues specific to the patellofemoral joint. Popping sounds in the hip may suggest separate conditions such as hip impingement or labral tears, while thigh cramping at rest could indicate muscle fatigue or electrolyte imbalances unrelated to patellofemoral syndrome. Thus, knee swelling after exercise is particularly relevant and characteristic of patellofemoral syndrome.