Nearly a month after the double J-tube was placed, positive urine protein and urine occult blood, and high leukocytes and red blood cells may be due to the irritation effect of the double J-tube or the occurrence of urinary tract infection. 1. Double J tube irritation: after placing the double J tube, the wall of the double J tube will irritate the ureter, bladder and urethral mucosa, which may cause the patient to have positive urinary protein, urinary occult blood, and mildly elevated leukocytes and red blood cells. Generally speaking, no special treatment, drink more water, reduce stooping activities can be relieved. 2. Urinary tract infection: If the patient has positive urine protein, urine occult blood, and white blood cells, red blood cells are high, and accompanied by low back pain, fever and other uncomfortable symptoms, may be due to urinary tract infection, may need to replace the double J tube and antibiotic treatment. Patients with indwelling double-J tubes need to be reviewed regularly and seek medical attention if discomfort occurs.