Kidney stones can cause low back pain, the causes of low back pain include two aspects, as follows: 1, hydronephrosis, when kidney stones block the renal pelvis outlet, the urine produced by the kidneys can’t be discharged into the ureter through this outlet smoothly into the bladder, which will result in hydronephrosis, and when hydronephrosis occurs, the pressure inside the renal pelvis will be elevated, which will lead to the symptom of low back pain. 2, the kidney stones staying for a long time may lead to infection in the renal pelvis, the infection can cause congestion, edema, erosion of the mucosa of the urinary tract, can also cause pus urine and other manifestations, all of which can be manifested as low back pain, and can even appear in the performance of elevated body temperature. So when there is a kidney stone, the most common symptoms of the patient is back pain, accompanied by urinary frequency, urinary urgency and other urinary tract irritation, serious patients will be accompanied by chills, high fever or hematuria and other symptoms, then you need to further medication to control the infection, and then assisted by extracorporeal shock wave lithotripsy or assisted by surgical treatments to remove the stone completely, the infection is cured completely.