20 days after the placement of the double J tube still urinating blood, the general reason for hematuria is the incorrect placement of the double J tube, rubbing the mucous membrane, causing bleeding caused by the rupture of capillaries, which is discharged through the urethra to form hematuria. In addition, inflammatory stimulation, urinary stones, etc. can cause hematuria, which can be treated symptomatically under the guidance of a doctor.1. Frictional bleeding: Because the double J tube is placed in the ureter, connecting the renal pelvis and bladder, with J-shaped hook-like objects on both sides, the patient’s activity will be due to the friction of the tube wall on the ureteral mucosa or renal pelvis, which will make the mucosa congested and easily cause rupture and bleeding, and the patient will also have symptoms of lumbar soreness and urethral irritation. If the amount of bleeding is small and it is not time for extubation, you can drink more water to promote urination, pay attention to personal hygiene, do not hold urine, and take oral tamsulosin as prescribed by the doctor to improve the symptoms. If the extraction time is reached, the hematuria symptoms can gradually disappear after the pipeline is removed by professional medical personnel; 2. Inflammatory stimulation: When urinary system infection is confirmed by urine culture, you can choose to follow the doctor’s prescription for extraction and take oral antibiotics for anti-infection treatment, such as roxithromycin and azithromycin, etc. when the extraction time is reached. If it is not time for extubation or the patient is not suitable for extubation due to various indications, in addition to antibiotic treatment, it is also necessary to apply symptomatic drugs to stop bleeding, drink more water and closely monitor the changes in the condition. 3. urinary stones: If the concentration of calcium and oxalic acid in urine is too high, stones are easily formed and may wear the mucosal tissue, accompanied by symptoms of hematuria, which usually require surgical removal of stones or extracorporeal shock wave lithotripsy to relieve This usually requires surgery to remove the stone or extracorporeal shock wave lithotripsy to relieve the symptoms. In addition, patients need to pay attention to appropriate activities, not strenuous exercise, avoid twisting and other movements, avoid drinking strong tea, coffee and other beverages, pay attention to the color of urine, if there are abnormalities, promptly seek medical review.