Lying down and getting up without pain in the back, may be the mattress reason, may also be caused by certain diseases, such as lumbar muscle strain, lumbar degenerative disease, etc., should be timely consultation, identify the cause of the disease, and active treatment. 1, mattress reasons: due to the mattress is old, uneven, hard or too soft, resulting in lying down when it is difficult to maintain physiological bending, easy to cause lying lumbar pain up without pain performance. 2、Pathological factors (1) lumbar muscle strain: mostly due to heavy physical labor or long-term exertion, improper posture, cold, etc., patients mainly manifested as recurrent widespread lumbar pain, in lying down due to the back of the lumbar region can be caused by the pressure of lumbar pain, can be in the change of position after the pain has been relieved to a certain extent, and some patients can be accompanied by impaired activity. (2) Lumbar degenerative disease: mainly caused by prolonged improper posture or ageing, lumbar vertebrae and the surrounding tissues are aging or degeneration, prolonged lying due to the change of lumbar vertebrae position can easily induce the symptoms of lumbar pain, and the pain can be alleviated after getting up. Patients are usually accompanied by limb numbness, weakness and different degrees of lumbar activity limitation. There are many reasons for the appearance of lying back pain, should be timely consultation, improve the relevant examination, a clear diagnosis, if necessary, by the doctor to give targeted treatment.