Retaining your back straight, raise your still left leg and position your still left ankle on your suitable knee. Lean marginally ahead to deepen the extend. Sciatica-like pain could arise while in the buttock due to piriformis syndrome, where an inflamed or spasming piriformis muscle presses on the sciatic nerve, https://www.theorthopaedicandpainpractice.com/lower-back-and-buttock-pain/