Strictures are prone to occur after ureterotomy anastomosis. If the prognosis is poor after ureteral surgery, there is a good chance that another stricture will form. Moreover, after ureteral anastomosis, some patients will be exposed to disease-causing factors for a long period of time, such as keeping bad habits for a long period of time, inactivity, and not drinking water, etc., which may cause ureteritis again, and if the inflammation is not eliminated in time, stricture will be formed again. After ureteral surgery, if the suture site becomes infected again, or if there are too many sutures, a stricture may form again. Ureteral strictures can also occur if upper urinary tract stones occur before surgery and are not treated promptly after surgery. If ureteral resection has already been done, it is necessary to have regular follow-ups to analyze whether there are other complications and whether secondary infections have occurred, and then to tailor the treatment according to the diagnosis.