Memory Foam Beds Are Great For Back Pain
Memory foam works by releasing the pressure a harder mattress puts on the pressure points in your body. If you have to sleep in one position to go to sleep, it may be that is the way you have found that takes the pressure off some of those pressure points. You may not even realize that is why you must sleep like that; it just is more comfortable for you.
If you have back pain in your lower back when you wake up in the morning, you may be able to solve it a great deal with a good visco elastic foam mattress (also known as a memory foam bed).