After the removal of double J tube urination is painful, usually pain 2 ~ 3 days are normal, if the pain time is too long, you need to rule out whether the occurrence of urinary tract infection. Due to the process of removing the double J tube, the double J tube and the patient’s ureter will inevitably occur relative friction, the friction process may cause slight damage to the mucosa of the ureter, so it is normal for patients to feel lower back pain after removing the double J tube. In addition, patients may also experience symptoms such as frequent urination, urinary urgency, urinary pain and hematuria, which are also normal. Pain for 2~3 days after removal of double J tube is usually normal, but if the pain lasts for too long, then the pain may be due to urinary tract infection, and the patient will not only have symptoms such as low back pain, frequent urination, urinary urgency, painful urination, bloody urination, etc., but will also have fever and weakness, etc. It is recommended to consult a doctor as soon as possible in this case. If the double J tube is removed, please follow the doctor’s instructions to improve the follow-up review and treatment.