The diameter of the narrowest part of the ureter is 0.2-0.3cm. If the diameter of the stone is less than 0.2cm, it can be removed by urination with exercise; if the diameter of the urinary stone is greater than 0.3cm, ultrasonic lithotripsy should be taken to discharge the stone or endoscopic removal of the urinary stone. As the path of stone removal is rugged, some cases should be combined with drugs to expand ureter, pain relief and anti-infection, so the process of stone removal should be carried out under the guidance of doctors.1. Small stone diameter: When the diameter of urinary stones is less than 0.2cm, the urinary tract is relatively smooth and can be discharged conservatively. Since the flushing of urine can be used as a driving force for stone discharge, patients can help the stone discharge by drinking a lot of water and doing moderate activities such as jumping rope and going up and down stairs quickly. When the stone is discharged to the ureteral stricture, ureteral dilating drugs such as tamsulosin can be used under the guidance of the doctor to assist the stone discharge to avoid causing colic. 2. Large stone diameter: When the diameter of urinary stone is larger than 0.3cm, the stone cannot be discharged smoothly with urine and needs to be discharged after ultrasonic lithotripsy. For larger or sharper shaped stones, endoscopic or surgical treatment should be taken, otherwise they are likely to cause stone colic and even scratch the inner wall of the urinary system, causing bleeding and infection.