Working out the cause. Nail varnish is one of the most common causes. After painting your nails, the varnish will give off tiny amounts of chemical vapour for a while, even when it feels dry. If you rub your eye, the eyelid skin may react. Artificial nails can cause a similar eyelid reaction.
The PCL (posterior cruciate ligament) is the strongest ligament, or band of tissue, in your knee. It stretches across the back of your knee. It connects your shinbone to your thigh bone and keeps your knee stable. A sharp, violent blow to the knee can stretch or tear your PCL. That can make it hard for you to get around.
Medial Collateral Ligament (MCL) Injury. The medial collateral ligament, or MCL, is commonly injured while participating in sports such as football, hockey, and skiing. When the leg is hit from the outside while the knee is bent, the knee tends to twist and buckle causing the MCL to over-stretch or tear.iagnosing MCL Injuries. To diagnose an MCL tear and the extent of damage that has occured, your doctor will perform a variety of assessments: 1  Palpation and Observation is often the first step in diagnosing. 2  The joint will be examined for swelling, bruising and deformities.