"As you run, your hamstring fatigues and can no longer decelerate ... you'll feel a swollen lump like a water balloon and ...

It can be dull or shar pain. Symptoms Dull or sharp pain Swelling or a noticeable lump behind the knee Stiffness or difficulty bending of the knee Tenderness when pressing on the area Limited ...

Minnesota Vikings quarterback J.J. McCarthy had an injection in his right knee earlier this week to alleviate swelling that arose ... to make sure there was no cause for concern,'' O'Connell ...