Lying down with lumbar pain and getting up without pain can be caused by the following reasons: first, severe lumbar strain and lumbar dorsal myofasciitis, often caused by cold and strain, can have lumbar pain when lying down and sleeping, then check the X-ray film of the lumbar spine, CT, early examination and exclude other diseases to diagnose. Second, osteoporosis of the lumbar spine, when there is serious osteoporosis of the lumbar spine, there can be symptoms of lumbar pain when lying down but not after standing up, then we should check the X-ray, CT and blood tests of the lumbar spine to diagnose. Third, lumbar spine tumor, patients with lumbar spine tumor can often have back pain when lying down or sleeping at night, which is a kind of resting pain of tumor, then MRI, CT and blood test of lumbar spine should be examined for early diagnosis and early treatment.