If a double J tube is placed after urological surgery and blood in the urine is seen every day, the patient needs to go to the hospital for treatment. 1, hematuria can occur when urinary tract infection is combined during the period of double J tube placement, and it can be accompanied by discomfort such as urinary urgency and painful urination, and further urine culture examination is needed. If the infection exists, you need to use quinolone antibiotics or cephalosporin antibiotics for treatment, and then observe whether the symptoms of blood in urine improve after the infection is cured. 2, after the placement of double J tube too much activity, if still engaged in physical labor, the mucosal friction between the tube and the urinary tract can cause persistent bleeding, it is recommended that patients rest, and then observe whether the symptoms of blood in urine improve. If the blood in urine improves after rest, then drink more water, urinate more and continue to observe. 3. A small number of patients will experience intolerance after the placement of the double J tube, resulting in pain or hematuria. In this case, there is no co-infection, and the patient has not engaged in strenuous labor, but only due to the intolerance of the double J tube, it is necessary to remove the double J tube from the body in advance.