Mild effusion of 1.8 centimeters after ureterocystocele reimplantation usually does not require treatment if there are no other uncomfortable reactions. However, if the symptoms persist, treatment should be carried out in time, and common methods include medication and surgery. Generally speaking, the condition of mild hydronephrosis 1.8 cm can be left untreated for a while. This is mainly due to the fact that the kidney has been propped up and cannot retract naturally in a short time. Therefore, after ureteral bladder reimplantation, mild hydronephrosis 1.8 cm will still occur. If the symptoms of fluid retention persist for a long time and tend to worsen, it is necessary to consult a doctor in time. Often, the use of oxfloxacin, amoxicillin, and cephalosporins to prevent inflammation should be followed. If necessary, surgery can be considered to eliminate hydronephrosis by placing a ureteral stent. Ureteral bladder reimplantation is a high-risk surgery, so after the operation, patients should closely monitor the physical state, and should seek timely help from healthcare professionals if there are any abnormalities.