'Greater Trochanter Pain Syndrome (GTPS)' refers to pain around the greater trochanter which is the most protruding bone on the side of the pelvis (head of femur). In medical terms, the word 'Syndrome' is used to call symptoms that do not have an exact cause and it is also used as a broad term to explain pain around the area (Here, the area is the greater trochanter). Therefore, GTPS can also include pain from the surrounding muscles, gluteal tendinopathy and bursitis (see the image below). Basically, any type of pain around the greater trochanter can be called 'GTPS' no matter what the cause is.

Although there is no exact cause, the most reasonable explanation for GTPS is this. When there is increased friction between the greater trochanter and the greater trochanteric bursa (a sac of fluid that acts as a cushion surrounding the greater trochanteric), the bursa can get inflamed, which is called 'bursitis'.

If this friction continues without any proper management, the already-affected bursa will start to wear off due to the constant friction. Then, it will no longer protect the tendon of the gluteus medius (side hip muscle) from this friction, and in turn, the tendon will begin to rub against the bony structure, possibly causing gluteal tendinopathy. This will be elaborated with scientific evidence in the next posting.