If the stone is simply located in the renal pelvis, the pain is mainly chronic and vague, but is less pronounced if the patient sleeps. If the kidney stone falls into the ureter, it will cause strong ureteral spasm and renal colic, which is mainly caused by the movement of the stone in the ureter, and the pain usually lasts for 2-3 hours. If the connection between the kidney stone and the ureteral wall is tight, the pain will disappear. Ultrasound examination is needed to clarify the specific size and location of the kidney stone to select targeted treatment, and timely release the obstruction to prevent the progression of hydronephrosis and damage to kidney function.