Stones in the third stricture of the ureter, specifically at the lowermost end of the ureter, about 1 cm from the bladder, this location is called the third stricture of the ureter and is also among the narrowest locations in the ureter, so the majority of stones stay here. If you can pass this stricture, the stone can reach the bladder quickly, and the pain, nausea, vomiting and urinary tract irritation caused by the stone will then disappear quickly. If it is not possible to pass this stricture, it is necessary to assist extracorporeal shock wave lithotripsy, assisted medication or assisted ureteroscopy or ureteroscopic stone extraction to remove the stone to relieve the patient’s symptoms and achieve a cure. The ureter has two other strictures, one at the site where the renal pelvis joins the ureter, which is at the exit of the kidney, and one at the location where the ureter crosses the iliac vessels, which is located approximately at the middle of the ureter. Stones also tend to stay in the above two narrow locations. Patients need to drink more water and urinate more often to promote the discharge of stones downward through the flushing of urine plus the peristaltic movement of the ureter itself.