Lower Back Pain? Sciatica? Herniated Disc? Get LASTING Relief Back pain can be caused by many situations. One of the most common causes of sciatic pain is created when pressure is placed on the sciatic nerve by the piriformis muscle. Muscle imbalances pull the hip joints and pelvis out of place and this change of position typically shortens and tightens the piriformis muscle. Losethebackpain.com~Site InfoWhoisTrace RouteRBL Check