Where the lumbar disc herniation patients to consult, doctors always repeatedly advised that they must sleep on a hard bed, so why must patients with lumbar disc herniation sleep on a hard bed? This problem should first be said from the structure of the human spine, the human spine consists of 26 vertebrae, including 7 opera vertebrae, 12 thoracic vertebrae, 5 lumbar vertebrae, 1 sacrum and 1 coccyx. In early childhood, the sacrum is 5, the tailbone is 4, after adulthood, the sacrum and tailbone are fused into 1. 26 spinal bones are surrounded by tough ligaments connected to link the vertebrae, with a considerable degree of activity, although the range of activity of each vertebra is very small, but all the vertebrae together, the range of activity is very large. Under normal circumstances, the lumbar vertebrae protrude forward, the top in front of the lumbar strain 3 and lumbar 4 vertebrae, and this physiological curvature is gradually formed after infants and children start crawling to stand. In infants crawling, the lumbar region is naturally concave due to the weight of the abdomen traction and the initial formation of the physiological curvature of the lumbar spine. At the time of lumbar disc herniation, pain or numbness is caused by compression of nerves due to broken or fractured fibrous rings. At this time, if the patient sleeps on Simmons or bandage bed, due to the softness of the bed board, it is easy to form a situation of low in the middle and high around under the pressure of human body weight, which will affect the normal physiological curvature of the lumbar spine and cause contraction, tension and spasm of the lumbar muscles and ligaments, and aggravate the condition. On the contrary, lying supine on a hard bed can maintain the normal physiological convexity of the lumbar vertebrae, while lying on the side can maintain the lateral bend of the lumbar vertebrae, thus eliminating the pressure of weight and weight on the intervertebral disc, which is conducive to relieving the contraction and spasm of the lumbar muscles and ligaments, restoring the original balance of the lumbar muscles and rapidity, and the protruding nucleus pulposus can be dehydrated and reduced, promoting the absorption of edema and exudation of the nerve roots, and reducing the protruding nucleus pulposus to the nerve roots. The herniated nucleus pulposus can also be dehydrated and reduced in size, promoting the absorption of edema and exudation of nerve roots, reducing the compression of nerve roots by the herniated nucleus pulposus and relieving the symptoms. Therefore, patients with lumbar disc herniation must maintain the habit of sleeping on a hard bed.