Sciatica and piriformis syndrome is usually caused by abnormal movement in the sacroiliac joint (pelvis to spine attachment), which generally is an immobile joint. This movement has then caused the Piriformis muscle surrounding it to become over protective and thus pressing on the sciatic and possibly other nerves on the left side. We will only know if this is the case by testing out the stretches, manipulations and possibly massage to see if this helps the symptoms. Nerve im