There is always blood in urine after ureteral stone surgery is generally a normal phenomenon, may also be due to the bladder capillaries are not fully recovered, infection, stone discharge process damage, ureteral stent tube friction and other factors. 1. Normal phenomenon: generally due to the friction between the ureteroscope and the ureteral mucosa during the procedure, mucosal bleeding occurs, which leads to the phenomenon of blood in urine after ureteral stone surgery. It usually recovers on its own. 2. Bladder capillaries have not fully recovered: usually due to the bladder capillaries in the case of incomplete recovery, exercise will lead to capillary rupture again, which led to the phenomenon of ureteral stone surgery always have blood in the urine. 3. Infection: It may be due to the lack of attention to local hygiene and cleanliness after the ureteral stone surgery, resulting in bacterial infection around it, under the stimulation of bacterial infection, there is always blood in the urine after ureteral stone surgery. 4. The process of stone discharge: after stone crushing, the ureteral mucosa is damaged during stone discharge, resulting in bleeding. 5. Ureteral stent tube friction: after ureteral stone surgery, the ureteral stent tube may be left in place, and the friction of activities may cause hematuria. After ureteral stone surgery, you should pay attention to rest, keep local hygiene and cleanliness, if there is discomfort, you need to go to the hospital in time for consultation.