If you are having back pain every morning, this means that your sleeping position is wrong or you are not having a proper mattress to sleep. Although sleeping on your side is the most popular and comfortable sleeping position, it can cause the spine to stay out of position. This can induce a strain on your lower back. For additional support, it is better to fill the gaps between your body and mattress with more number of pillows. A pillow is necessary at the waist.