Let me help you: I do believe you did popped your cap or you could popped a torn cartilage or loose body in the knee or many other things could cause that popping. In any event this will cause the knee reaction and reaction of muscles around the knee and that will cause what are you talking about. All the above need a doctor to take of it (orthopedic surgeon). Good luck.
Answered 11/28/2017
5.2k views
See a doctor: It sounds like you may have dislocated your knee cap (patella). This is fairly common in young females in particular. You need to see an orthopedic surgeon or sports med doctor for evaluation and treatment.
Answered 8/23/2013
5.2k views
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