Kneecap dislocation occurs when the patella bone, which sits at the front of the knee, comes out of position. In the process, the connective tissues that hold the bone in place may stretch and tear. A ...

DEAR MAYO CLINIC: I was playing a pickup game of football with my kids, took a tumble, and my kneecap made a popping sound. It really hurt, then seemed to get better, but something's not right. Any ...

When things are in the groove, they’re going smoothly. That surely is the case with your knee. As long as your kneecap (patella) stays in its groove in the knee, you can walk, run, sit, stand, kneel, ...