Kidney stones do not fall into the fallopian tubes, but they may enter the ureter with the flow of urine. The fallopian tubes do not traffic with the female urinary system, so stones do not enter the fallopian tubes. Kidney stones enter the ureter during the flow of urine, and after entering the ureter, they are pushed downward by peristalsis, resulting in stone expulsion. The length of the ureter is about 20cm, and the stone needs to move about 20cm to enter the bladder and be expelled from the body, during which there will be pain or the stone stays in the ureter without being expelled. The diameter of the ureter is very narrow, the stone may stimulate the ureter to produce repeated spasms, which will cause intermittent pain, if the size of the stone is relatively large, it may be stuck in the ureter somewhere in the physiological narrowing and can not be discharged, it is necessary to assist the extracorporeal shockwave lithotripsy or surgical operation to dislodge the stone.