This is a misconception. The lumbar spine has a normal physiological curvature, and patients with lumbar disc herniation need a bed that is moderately soft and hard, and can maintain the physiological curvature of the lumbar spine at all angles, rather than a rigid bed. The hard bed cannot match the normal curve of the human spine, and the waist cannot be supported, but it will deform the spine, which is not only unfavorable for recovery, but also easy to cause back pain when sleeping.
Source: Guangdong 12320