Most of them are people with bad spine or problems, so doctors will recommend them to sleep on a harder bed. This is because their spine may have already been deformed by scoliosis. Sleeping on a bed that is too soft and not supportive enough will make the deformation of the scoliosis more severe. In addition, if someone has spinal or lower back pain, they should first seek treatment from a professional doctor before choosing the right one. Soft or hard mattresses are not medical products and cannot replace medical treatment.