A ureterocele is a tiny balloon of the ureter where it enters the bladder. It acts like a one-way valve stuck halfway open, so urine back-ups and infections start early.

The first hint is burning that keeps coming back. Urinary-tract infections loop every few weeks, even after antibiotics.

Urgency and frequency climb. You dash every hour, yet only a small amount comes out each time.

Flank pain pops up. A deep ache below the ribs can throb more as the bladder fills and ease right after you pee.

Blood may appear. Urine turns light pink or contains small clots, often without any fever.

A swollen lower-belly lump or constant pressure can show up if the ureterocele blocks the bladder outlet.

Late signs include fever, chills, and a swollen kidney—an alarm that urine is backing up toward the kidney.