Hi my son is 9 years old and plays football for a local academy. He hurt the side of his knee in a tackle about 3 weeks ago. It was badly bruised but we treated it with ice for a few days. There was no swelling or anything, however you can often hear a clicking sound in his leg when he moves. He says it is when he gets up, starts to run or stops running etc. At first it was not painful but he is now saying that he is getting a shooting pain up his leg after large clicks.