I have piriformis syndrome and have had it since 2002.
I have had four left hip surgeries an actebulum fracture and broke the pubic ramis. I have had one right hip replacement. My neurologist did an emg and the muscle remains contracted. The neurologist uses 200 mgs of Botox into the muscles and it last three months or longer. It’s very painful and common with hip replacements. We can’t stretch it out because I have a block in my left hip surgically implanted that keeps me from moving my hips certain directions.