The retrocaval ureter, also known as the pre-ureteral vena cava, is a rare genetic abnormality that causes the ureter to pass before the lower vena cava. Even though it is a structural deficiency, most people do not develop adverse effects until their third or fourth year of life as a result of the resulting kidney damage. An obstructed ureter can cause a lot of pain in the abdomen area. Painful urination, vomiting, limb oedema, or fluid imbalance could also be the symptoms. Medications to remove the illness, evacuation, or operation will be used to cure a blocked ureter.