Football can be a dangerous sport, and players run the risk of sustaining serious injuries each time they step on the gridiron. Among the most serious injuries is a dislocated knee, a rare event that ...

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, ...