Tightness in the back of the hip can be frustrating. You might feel it when you: Sit for long periods Drive Run Hike uphill Ski Lift Squat Cross one leg over the other Get out of the car Roll over in bed Many people describe this area as the “piriformis,” but the back of the hip is more complex than one small muscle. The deep gluteal region includes the glute muscles, piriformis, other deep hip rotators, connective tissue, and nearby nerves, including the sciatic nerve. A Fig