A bladder diverticulum is a pouch that bulges out from the bladder wall. It acts like a spare pocket, trapping urine and letting bacteria set up camp.

The first hint is a weak, stop-start stream. You push to start, the flow dies, then returns in short bursts.

Urgency and frequency climb. Because the pouch never fully empties, the bladder refills fast—hourly trips day and night.

Double-voiding becomes routine. You finish, feel relief, then need to go again five minutes later to empty the pouch.

Leakage between trips is common. Small spurts escape when you stand, cough, or roll over in bed.

Cloudy urine or a faint musty smell appear once bacteria grow in the stagnant pocket.

If the pouch grows large, a heavy lower-belly lump or cramp can be felt, and infections spike—an alarm that the diverticulum is overstretched.