A Lumbar Pillow can be used for a variety of purposes, such as supporting your head and neck, helping you to sit properly, and relieving pressure on your spine. There are different types of pillows available on the market, each designed for a different purpose. If you are experiencing pain in your back, adding a lumbar support pillow to your bedtime routine may be helpful. A lumbar support pillow is a small, firm pillow that is inserted between your legs and positioned behind your lower back.