Selecting a good quality seat cushion goes a long way in controlling sciatica pain. Make a note of the firmness of the pillow, and the material used in the filling, and find out if it’s a body pillow or lumbar support pillow and whether it can take off pressure from the targeted bones and muscles. Have a look at Ergo21 original Seat Cushion or Ergo21 Lumbar pillow for spine/back that helps reduce sciatica pain with its advanced LiquiCell technology. It is based on water-filled membranes that enhance cushioning and improve blood flow. The 4 membranes are hand stitched and strategically placed. Two under the tailbone and two under the thighs improving blood flow. The pillow can be used in a variety of seating options and offer relief from other back pain issues, such as degenerated discs, hip pain, lower back pain, etc.