A sprain on the outside of the knee, the lateral collateral ligament, is caused by a blow to the inside of the knee, which forces the knee to the outside. This is much less common than an MCL sprain because it is hard to get hit on the inside of the knee. Usually, your leg gets in the way and takes the blow.
his ligament can be sprained by a blow to the outside of the knee
particularly if your foot is planted on the ground when you are hit. The blow causes the knee to move toward the inside of the body and stretches the ligament
You will feel tenderness and pain