The most common type of back support pillow is the lumbar support pillow. Because of its rectangular or U shape, it fills the space between your spin and chair when you are seated. The lumbar pillow absorbs the weight that is responsible for back pain. Back pain usually happens when there is added weight or tension to the muscles of your back area. The lumbar pillow can also be used while sleeping and travelling. It is lightweight and portable. It is specifically perfect when you sleep upright or in a sitting position. These pillows are designed to give you a solid yet comfortable support when you sit down. They are usually round or rectangular and has a thick central section. This special area is sandwiched between the seat and your back, providing a support for your back to lean on and inevitably maintaining a correct curvature. These pillows are light and small, allowing them to be carried around easily.