Most Lower Back Issues are related to the following Muscles:
     Gluteus (Maximus, Medius and Minimus)
     Piriformis
     Psoas
     Iliacus
     Rectus Abdominus
     Quadratus Lumborum

Deep Massage and Triggers can relieve a majority of the Pain and Issues.

A majority of the time relief from Sciatic Issues can be relieved from Triggering the Quadratus Lumborum, Gluteus Minimus and Piriformis Muscles followed by a Great Stretch of the Hip / Pelvis Joint.  I have had clients receive relief from as little as a Couple Days to never having Sciatic Pain again, results are individually based.