Sleeping up back pain may be physiological factors, may also be the manifestation of certain diseases, such as soft tissue inflammation, lumbar disc herniation, other diseases, etc., should be timely consultation to find out the cause of the disease. 1. Physiological factors: if the patient maintains an inappropriate sleeping position at night, it is possible that the lumbar muscles are too hard and tired, which leads to the symptom of lumbar pain after a nap. 2. Pathological factors (1) Soft tissue inflammation: for patients who have over-exerted their lumbar muscles for a long time, it may lead to strain of the lumbar muscles, resulting in aseptic inflammation of the lumbar soft tissues, which induces the disease due to keeping the same position for a long time during sleep, and the symptoms of lumbar pain after a night’s sleep appear. (2) Herniated lumbar intervertebral discs: If the patients with herniated lumbar intervertebral discs compress the nerve roots for a long time during sleep, the symptoms of lumbar pain will also appear after sleeping, which may be accompanied by numbness of the legs. (3) Other diseases: lumbar trauma, spinal stenosis and many other lumbar spine diseases may cause lumbar pain after sleeping. In addition, lumbar organs, such as kidneys and other lesions, may also cause symptoms of back pain when sleeping, need to consult a doctor to determine the nature of the disease. If physiological causes are ruled out, the patient should consult a doctor to clarify the cause of the condition and undergo appropriate tests if necessary.