The position you feel the most comfortable in with a herniated disc depends on the location of the injury in your spine. Many people prefer a side-lying position, which helps their spine stay in alignment. Some find sleeping on their back to be the most comfortable. We don’t suggest stomach sleeping, as this may put added pressure on your spine.The position you feel the most comfortable in with a herniated disc depends on the location of the injury in your spine. Many people prefer a side-lying position, which helps their spine stay in alignment. Some find sleeping on their back to be the most comfortable. We don’t suggest stomach sleeping, as this may put added pressure on your spine.