Minnesota Vikings quarterback J.J. McCarthy underwent a second surgery on his right knee after experiencing some swelling, ...

Although gout often affects the big toe, it can also cause knee pain, particularly when walking. Baker's cyst: A Baker's cyst ...

landing after a gymnastics vault, evading a football tackle or jumping off a rock onto the beach. Suddenly, you feel a pop in your knee, then immediate pain followed by swelling. You may have just ...