Sleeping in a hard bed every morning to get up and back pain, consider and muscle strain, lumbar spine disease, autoimmune diseases and other reasons. 1. Muscle strain: the normal spine has a physiological curvature, the side of the “S” shape, the choice of bed should be in line with the physiological curvature of the spine, hard beds can not provide effective support for the body, which will cause the spine’s bad curvature, more likely to cause muscle strain, resulting in back pain. 2. Lumbar spine diseases: such as lumbar disc herniation, lumbar spinal stenosis, etc., these diseases themselves will cause back pain, if the bed is too hard, it is not conducive to the normal physiological curvature of the lumbar vertebrae, which will result in the lumbar vertebrae by the increased pressure, will also aggravate back pain. 3. Autoimmune diseases: such as ankylosing spondylitis, ankylosing spondylitis will involve the spine and other tissues, will cause spinal ankylosis, bed too hard is not conducive to the physiological curvature of the lumbar vertebrae, will aggravate back pain. There are many reasons for getting up in the morning with back pain, and if you have pain all the time, you need to go to the hospital for further examination and treatment.