Sudden popping sensation at the time of injury
Immediate pain in the knee
Rapid swelling within a few hours
Knee feels unstable or gives way
Difficulty bearing weight
Reduced range of motion
Pain when trying to pivot, twist, or change direction
Tenderness around the knee
Trouble continuing sports or activity after the injury
Feeling like the knee is “loose” or not supporting you
Diagnosis confirmed by a medical exam and imaging, such as an MRI