How the bladder works
Each time you eat and drink, your body absorbs liquids. The kidneys filter our waste and extra water to make urine. The urine is stored in your bladder. Nerves tell the brain when the bladder is full. That’s when you get the feeling that you need to go to the bathroom.
A normal bladder muscle sends a strong signal when it’s full
It expands like a balloon to hold a cup or two of urine. As it fills, it sends stronger and stronger signals that it’s time to go. When you feel ready, you go to the bathroom.
An overactive bladder (OAB) muscle sends “false alarms” before it’s full
These emergency "false alarms" can cause a strong, sudden urge to go. And may even lead to wetting accidents.
There are various ways to manage an overactive bladder, including small lifestyle changes and medication. Talk to your doctor about the treatment option that’s right for you.


