Sleeping on a hard bed will have painful symptoms in the lumbar region, the following reasons are common: First, insufficient muscle blood supply: hard bed has benefits for the lumbar spine in the short term, if you sleep on a hard bed for a long time, it will cause continuous pressure on the lumbar muscles, which leads to insufficient muscle blood supply, and the patient will naturally produce clinical symptoms of lumbar pain. Second, lumbar spine lesions: sleep hard bed can not make the lumbar spine physiological curvature to get enough support, long-term sleep hard bed will make the lumbar spine physiological curvature changes, lumbar spine straightening, can be secondary to lumbar disc herniation and other lesions, lumbar spine joints are prone to disorders, the patient will have clinical symptoms of lumbar pain. Sleeping on a hard bed can provide short-term relief from lumbar disc herniation and lumbar trauma, but long-term sleeping on a hard bed can cause adverse consequences. When sleeping on a hard bed, a soft quilt should be laid to avoid excessive contact between the lumbar region and the hard bed.