The main function of a ureteral stent is to drain urine and support a narrowed ureter. Ureteral stents are often used in urological surgeries. The middle part of the ureteral stent is empty, which can effectively drain the urine, thus reducing the accumulation of urine in the body and alleviating the damage to the kidneys. Ureteral stent can also play a role in expanding the ureter, can effectively treat ureteral stenosis, etc.; if the patient has urinary tract stones, due to the narrowing of the ureter, can not be discharged, after placing a ureteral stent, it will make the patient’s ureter thickened, so as to make the urinary tract system normal discharge of the stones, and effectively reduce the patient’s pain in the process of stone removal. There may be mild pain after placing a ureteral stent, but if the pain is more severe, it is necessary to go to the hospital for examination.