Piriformis syndrome is usually a neuromuscular affliction when the piriformis muscle (a pear-shaped muscle from the buttocks) compresses the sciatic nerve (a nerve that extends from the lower backbone each of the way all the way down to the foot). This results in pain inside the buttocks and hips. In https://www.theorthopaedicandpainpractice.com/lower-back-and-buttock-pain/