Keen soccer player Ms. K presented with sharp pain just under the kneecap. It was very sore when running and going up and down stairs. She had fat pad impingement of her knee.
The fat pad is “cushion” structure sitting below the big tendon that joins the kneecap to the shin bone. It can become swollen from the kneecap squashing into it through sport or impact. Although not a severe structural injury, it can be very restrictive due to the pain. “Fat pad impingement” is a common presentation for stop start sports participants. In the old days it was common with the staff in English castles who were scrubbing floors (housemaid’s knee!).
Simple taping is usually very effective, and I often enjoy the look on the sufferer’s face after they go up a step after being taped (and it doesn’t hurt!). Management of knee stiffness, strength, relative rest and return to normal activities then begins.
Untreated it can persist for a long time and will invariably lead to loss of strength in the knee and possible further problems from this.
Avoid power activities of the knee that hurt: stairs, ladders, hills, squatting and sprinting as well as kneeling (AND no scrubbing floors!).

