How long does it take for a stone to be discharged from the upper ureter depends on the condition of the ureter and the size of the stone. Generally, stones less than 6mm in the upper ureter can be discharged in about 3-7 days in most cases, but if they are more than 6mm, they are difficult to be discharged and require extracorporeal shock wave lithotripsy or surgery. The condition of the ureter itself determines the time to expulsion. For patients who have experienced stone expulsion, stones less than 8 mm may be expelled in about a week. For patients who have not experienced stone removal or patients with ureteral stenosis, the stone may stay for a long time after four weeks and cannot be expelled. Therefore, it is recommended to go to the hospital for a comprehensive examination to determine the size of the stone and the condition of the ureter. In most cases, stones smaller than 6 mm are discharged in about a week, while stones larger than 6 mm are difficult to be discharged.