I may just be worrying a bit too much but my little girl is 8 years old and she is very active does gymnastics 4 hours a week. She's very slim although she eats well. I have noticed that on both knees there is a a boney lump on the side of her knees the outer parts. They both feel around the same I would say one may be bigger than the other one. Is this normal? With one being a tiny bit bigger? I didn't know if like feet one is always bigger than the other? She does say her legs hurt now and again and her ankle on too but she does land hard on her legs doing gymnastics. She is otherwise fit and healthy should I be worried about this? Would anyone say this is the same for their child? Anyone seen the same? Any help I would appreciate my other half thinks I've lost my mind.