GTPS is a condition where pain is felt on the outer side of the hip that may also travel down the outer side of your thigh. It can present suddenly through overuse or build up gradually over time.
The pain is most likely due to irritation, over loading or degeneration of one or two of the smaller hip muscle tendons (gluteus medius and minimus) where they attach into the hip bone. This is also known as ‘tendinopathy’. In roughly 20% of occurrences there may be an associated inflamed bursa known as a bursitis contributing to pain..