Two important ligaments run along either side of the knee to add necessary stability to this complex joint. The medial collateral ligament (MCL) runs along the inside while the lateral collateral ligament (LCL) is on the outside. Together these ligaments work to prevent sideways motion of the joint and prevent unusual movements. Excessive force to the inside or outside of the knee can sprain or even tear these ligaments. BioSkin Knee braces are designed to address the initial swelling from the injury, as well as provide the reliable support while the ligament heals.