The only time during which the muscles, ligaments and other structures in the spine can completely relax is while sleeping. And when a person suffers from a back injury or disorder, it’s especially important to sleep well in order to help the healing process.
While there are no absolute rules, there are a few general guidelines about sleeping positions that are most comfortable for the spine:
While these guidelines are true in general, the position that is most comfortable to sleep in is again largely dependent individual preferences and on the type of back pain one has.