I am experiencing a terrible back pain while laying down, also. I am a 48 y.o. female, sitting at work 8 hours at office every day. It usually starts after 4 hours of sleep and it seems that right side of middle section of back hurts most. Pain is so intense, I have tried to lay on my stomach, on the right side, on the left side, put a cushion under my knees etc, and nothing has worked. I had to put thick cusions behind my back and literally sat asleep for many nights because of that. Usually my pain goes away after getting up, moving around and once the pain is gone, it's even hard to pinpoint where exactly it hurt. Went to a Chilopractor, tried MuscleEase that he recommended, did electric massaging, went to a medical doctor who just thought I had pulled a muscle or something, tried prescription drugs (muscle relaxant, pain killer, sleeping pills), nothing really cured my problem. I came across someone's post about Lordosis and I started wondering if it was something hip related, so I also considered going to Rolfing, but before that, I decided to start stretching and Yoga to see if it works. It's a few weeks ever since I started stretching and do some Yoga. My husband says it is important to stretch every part of your body, not just lower back, so I am trying to do several kind every day. My pain was going for over one month and during the period I never slept through laying down, but now I am getting to the point that I can keep laying down, even if I still feel some pain. I just realized that when this problem happened, I tried to find someone coming over to magically "cure" my pain and give me some solution, but probably this is something I have to work on it, too. I am not quite sure if my case is Lordosis or it's a solution for other people's cases, but at least stretching and moving my body seem to be working for my body.