Lateral knee pain
Lateral (outer) knee pain can be caused by several things, but the most common cause is Iliotibial Band Syndrome, an overuse injury due to the Iliotibial band rubbing on the outside of the joint.
This pain on the outside of your knee, is also called Runner's Knee.
The iliotibial band, a thick band of fibrous tissue that runs down the outside of the leg, works in coordination with several of the thigh muscles to provide stability to the knee and to help in flexion of the knee joint. When irritated, movement of the knee joint becomes painful. Usually the pain worsens with continued movement, and resolves with rest.