MCL Tears Vs. ACL Tears
The medial collateral ligament (MCL) is along the inside of your knee, while the anterior cruciate ligament (ACL) is in the front of your knee. Your MCL keeps your knee from bending too far inward and allows it to rotate, and your ACL helps to keep your knee steady and prevents it from turning too much.
MCL tears typically occur during rigorous physical activity, oftentimes during sports like football or soccer. A tear occurs when the knee is hit directly from the outer side. This stretches the ligament and can cause tearing.