I am 19 and I feel like I'm 90. I've had pain in my legs, starting from the time I was twelve and getting progressively worse. I have spent the past year talking to doctors and being passed around and ended up with 'we don't know, take aleve and come back if it gets worse'. frustrating to say the least. this pain starts in my knee usually and works it's way up to my hip and then down my shin. it's like an ache and I can't explain it. it's like my bones are exploding . I can't find a patter for causes. usually it lasts anywhere from thirty minutes to a few hours. I have a very hard time explaining the pain . it's almost like someone microwaved my knee cap and then put it back in my leg. does anyone even know of anything like this?