Double J tube is usually pulled out 2~3 days after the disappearance of urinary pain, if 2~3 days after the urinary pain is still not disappeared, should consider the possibility of urinary tract infection, or there are residual stones in the urinary tract. Double J tube, also called double pigtail catheter, is widely used in urological surgery, which can be used in the treatment of kidney stones, ureteral stones, hydronephrosis, renal transplantation, benign tumors of the kidney and ureter and other diseases. Generally, urinary pain can be relieved in 2~3 days after extraction. If the urinary pain is still not relieved after 2~3 days, it may be due to the occurrence of urinary tract infection or residual stones in the urinary tract and other abnormalities. Urinary tract infection can lead to urinary pain even after the removal of the double J tube, which is due to the inflammatory stimulation of the urinary mucosa caused by the infection; in addition, there are stones left in the urinary tract, stone stimulation of the urinary mucosa, which can also lead to urinary pain in the patient. If the symptoms of urinary pain still occur after the removal of the double J tube, you should consult your physician in time and ask him or her to treat it, in order to strive for a speedy recovery.