Piriformis syndrome is a neuromuscular condition if the piriformis muscle mass (a pear-formed muscle mass during the buttocks) compresses the sciatic nerve (a nerve that extends from the lower spine all the way all the way down to the foot). This results in pain during the buttocks and hips. Sufferers https://www.theorthopaedicandpainpractice.com/lower-back-and-buttock-pain/