What is MCL sprain?

If you collide with another player when you’re playing a sport and the side of your knee is hit hard, your MCL may be injured. The MCL (medial collateral ligament) is a band of tissue that runs along the inner edge of your knee. It helps to connect your shin and thigh bones to keep your knee stable and working properly when you move.

More on MCL Sprain

When your MCL is damaged, your knee can over-extend itself, or bend too far in a direction that it’s not supposed to bend. You may heal on your own with basic care, rest, and rehab. But if your injury is severe, you may need to have surgery.