The iliotibial band (IT band) is the thick band of tissue (fascia) that runs parallel to the femur, from the upper most portion of the hip bone, down the outside of the thigh, crossing the knee joint, and attaching to the top part of the tibia or shinbone.
IT Band syndrome is an overuse injury and the most common cause of outside (lateral) knee pain in runners, cyclists, and athletes who are repeatedly in the squatting position.Symptoms may include persistent swelling, redness, warmth to the touch, and pain not relieved with rest, ice, compression and elevation.
You should call your doctor if you are having ongoing lateral hip, thigh, or knee pain with physical activity and exercise.