Always back pain may be caused by long-term strain, cold stimulation and other physiological reasons, but also may be caused by lumbar diseases, urinary, gynecological system diseases and other pathological factors. 1. Physiological reasons: long-term heavy physical labor or standing for a long time and sitting for a long time, the lumbar myofascia is in a state of tension for a long time, which may lead to local obstruction of blood circulation, accumulation of lactic acid, leukotrienes and other metabolites, stimulation of the peripheral nerve roots, resulting in pain symptoms; long-term blowing fans, blowing air conditioning, which may lead to the spasm and stiffness of the lumbar myofascia, may also appear in the above symptoms. 2. Pathological factors: diseases of the lumbar region itself may directly lead to symptoms of lumbar pain, such as lumbar disc herniation, lumbar spondylolisthesis, etc.; women who have chronic gynecological inflammation, not treated in time, may also lead to lumbar radiating pain, such as pelvic inflammatory disease, salpingitis, etc.; the kidneys are in the retroperitoneum, and when there is a disease, it may also lead to radiating pain in the lumbar region, such as renal stone, glomerulonephritis and so on. The symptoms of lumbar pain alone sometimes can not accurately determine the cause, but also need to be combined with the characteristics of the medical history, other test results in order to make an accurate judgment, it is recommended to clarify the cause of the disease under the guidance of a doctor.