The stone in the intervesical segment of the left ureter is the most terminal stone in the ureter, which is about 1 cm away from the bladder. If the stone can enter the bladder through the narrow segment, the patient can urinate by himself and expel the stone, which means the disease can be cured by itself. Some patients may even experience difficulty in urination. It is recommended to go to the hospital for examination to clarify the size of the stone, extracorporeal shock wave lithotripsy, symptomatic pain treatment, or the use of drugs to dilate the ureter, and then assist in drinking more water, urinating more, and assisting a certain amount of exercise to promote the discharge of the stone into the bladder as soon as possible, then the stone caused by hydronephrosis and pain, urinary tract irritation symptoms can quickly disappear. At the same time, for patients with stones that stay in the interstitial segment for a long time, if conservative treatment is ineffective and the pain is obvious or causes severe hydronephrosis, they need to undergo surgery and use ureteroscopy for stone extraction treatment to achieve a complete cure.