For the past month and a half my left knee has been hurting off and on. The pain seems to be on the outside of the knee. It throbs when I sit for long periods of time or if I set Indian Style or cross legged. Sometimes when I get up to walk if hurts really bad for a minute and feels like it is gonna give. I know I prob need to go to the doctor but ahy ideas as to what it could be would be helpful. I am 27 with 2 kids so I stay on the go all the time.