Otherwise known as Patellofemoral pain or anterior knee pain
Patellofemoral pain is what happens when your knee cap rubs against the groove in your femur (the thigh bone), in a way it is not supposed to.
This abnormal friction can wear down the cartilage under your knee cap, causing the pain you feel when you exercise, particularly walking and running.
One way to improve patellofemoral pain is to strengthen the muscles that are weak, while stretching and lengthening what's tight. Another way, is to choose a knee support that:
Lifts, supports and stabilizes your knee cap
Is made from a breathable, flexible material that allows for activity