The length of the ureter in males is around 27-30 centimeters, with an average length of 28 centimeters; in females, it is around 25-28 centimeters, with an average length of 26 centimeters. There is one ureter on each side, with an average diameter of between 0.5 and 0.7 centimeters, and three physiologic strictures are present: at the beginning of the ureter, across the iliac arteries into the lesser pelvis, and through the bladder wall. Knowing the length and diameter of the ureter and the three physiologic strictures can help in the diagnosis and treatment of the condition. In the case of ureteral stones, for example, if the stone is 0.6 centimeters or less in diameter, it can usually be expelled on its own. The need for the patient to drink more water and exercise can help the stone to be discharged downstream. If the diameter of the stone is larger than 0.6 cm, it may be embedded in the local area, under the guidance of the doctor, you can take drugs to promote the discharge of stones such as potassium sodium citrate granules and tamsulosin, etc., to help the discharge of the stone. If the stone becomes embedded and cannot be discharged, the stone should be removed through ureteroscopy at an early stage.