The feeling of stomach distension after removing the urinary catheter after ureterocele reimplantation may be due to anesthesia, position or pain, which may lead to urinary retention. 1. Anesthesia: If the anesthesia chosen for the operation is subarachnoid anesthesia, before the anesthesia effect is completely finished, it may cause the patient to have bladder contraction disorders, and then urinary retention will occur, resulting in the patient feeling bloated. 2. Position: Since patients after ureteral bladder reimplantation are usually asked to lie down in bed, some patients may find it difficult to urinate during the period of lying down because they are not adapted to this position of excretion, leading to the emergence of urinary retention and causing abdominal distension. 3. Pain: As the damage to the organs caused by the surgery will bring about pain, therefore some patients may experience inability to reasonably apply abdominal pressure to urinate. Patients are advised to communicate with their doctors in time and target treatment.