Clinical treatment for kidney stones or ureteral stones is mainly minimally invasive laser lithotripsy through ureteroscopy. However, because ureteroscopy is an invasive examination and treatment means, will lead to medical source of ureteral mucosal injury, in the postoperative period will appear local congestion, edema. After lithotripsy, the doctor will leave a double-J tube, which is implanted into the renal pelvis, ureter, and bladder through a catheter and ureteroscope, and will be locally supported for 6-8 weeks. The tube can be removed from the bladder under direct visualization through a cystoscope at the time of a follow-up visit to the hospital. The tube is soft and there is no significant discomfort, and after removal the patient can return to normal exercise and routine. Drink plenty of fluids and urinate regularly to prevent recurrence of stones.