So my friend is having some problems with her knees. When she rotates her leg from side to side you can hear a cracking, kinda like when you crack your knuckles. When I asked if it hurt when they crack, she said it feels like it does when you crack your knuckles. Sometimes she has trouble standing from a kneeling position.

Anyone have any insight to what the problem might be? If you need more info, lemme know and I will ask.