We've got a lot of great tips on our website, including information about certain health issues. For example, Runner's knee, or IT Band Syndrome, is a sharp pain on the outside of the knee or hip caused by the friction between your iliotibial band and knee or hip. This friction can be due to different factors, including overpronation, excessive supination, leg length discrepancies, tight hamstrings or IT bands, foot structure and/or muscle imbalances.