Ureteral edema after the removal of double J tube may be a normal manifestation, but also may be caused by injury, infection and other factors. 1. Normal performance: after the removal of double J tube, the ureter may be mild edema, is a normal clinical manifestation, edema can usually improve on their own, patients should increase the amount of water, more urination, to prevent infection. 2. Injury: When the double J tube is removed, the ureter and urethra are locally damaged, and ureteral edema may occur, which may be accompanied by urinary difficulties, urinary frequency, hematuria and other symptoms. 3. Infection: improper care after the removal of double J tube, ureteral localized infection, infection aggravation may lead to edema, may also be accompanied by frequent urination, lower back and abdominal pain and other symptoms. After the removal of double J tube, the ureter is edematous and accompanied by obvious pain, there may be abnormalities, it is recommended to consult a doctor for examination and treatment.