Low back pain may be a disease of the locomotor system, requiring consultation in orthopedics or spine surgery; it may also be a disease of the urinary system, requiring consultation in urology. Most of the low back pain is caused by lumbar spine diseases, such as lumbar muscle strain, lumbar disc herniation, lumbar spinal stenosis, etc. This kind of disease tends to have a long history, and the pain is characterized by lumbar pain as somatic pain with a clear and fixed position. In addition, there will be lumbar pressure pain, lumbar muscle spasm, limited lumbar movement and other manifestations. Orthopedics or spine surgery can be consulted. Urological diseases that can cause low back pain include ureteral stones, acute pyelonephritis, renal tumors, etc., with different clinical symptoms. Acute pyelonephritis is often characterized by lumbar pain or distension, accompanied by high fever, chills, fatigue, muscle aches and other signs of infection and poisoning. Ureteral stones caused by lumbar pain more sudden onset of pain, pain is intolerable, the patient tossing and turning difficult to lie down; renal tumors caused by lumbar pain is mostly dull pain, hidden pain or swelling pain, the location of the vague and not fixed, and sometimes can be found in the lumbar mass. These diseases usually go to the urology department.