Most of the people reading this might be already used to sleeping on a comfy mattress. A few of them might even be using a box spring to add to the comfort of the mattress. Some studies suggest that if the mattress is too soft, you might be sleeping in an awkward position. If you really sink into the mattress, the chances are high that the spine might be in a stooped position. This can lead to back pain in some people. Doctors still recommend using a mattress that is not too soft rather than ditching the mattress altogether.