To do ureteroscopy, sequelae may also occur, 1, the most common is ureteral stenosis, multiple ureteroscopy surgery may lead to scarring of the mucosa, resulting in stenosis.2, fever may also occur, because ureteroscopy surgery needs to be flushed, which will lead to high pressure in the kidneys, and there is an infection that will be absorbed, which will lead to the development of septicemia.3, ureteroscopy can also lead to bleeding, because the mucosa of the ureter in the The ureteroscope is moved within the ureter, and the mucosa can be damaged.4. Ureteroscopy can also have a very serious sequela, which is ureteral dissection, and after ureteral dissection it may be necessary to perform ureteral anastomosis of the severed end in an emergency, or renal transplantation after detachment of the ureter.