Low back pain, lying down also pain, can be caused by the following kinds of reasons: first, serious lumbar back myofasciitis and lumbar muscle strain, these two diseases can lead to low back pain, can be lying down or night sleep, morning when the back pain, this time to early examination and examination, to exclude other diseases to diagnose. Second, osteoporosis, severe osteoporosis can lead to lumbar pain, especially at night when lying down, the pain is very obvious, then we should check the lumbar spine X-ray, CT and blood tests to diagnose, if necessary, to the endocrinology department to identify the cause. Third, tumors of the lumbar spine, when there are tumors or metastases in the vertebrae and accessories of the lumbar spine, there can be lumbar pain, which can be accompanied by resting pain when sleeping at night, and it is necessary to check the MRI and CT of the lumbar spine and do blood tests for diagnosis and early treatment.