Dr Leslie Gellman

Overactive Bladder Symptoms (OAB)

What is the bladder?

The bladder is the organ which stores urine produced by the kidneys. It is a muscle in the shape of a bag which can hold around 500 millilitres of urine. Most people start feeling their bladder is filling when it is half full. In order to empty the bladder, you have to be able to relax. 

This usually means being in a socially convenient environment, such as a toilet or a private space. The brain will then send a signal to the bladder to start squeezing out the urine. How often you urinate depends on many factors, but in particular on how much you drink. Most people urinate less than 8 times during the day and either not at all or once during the night.

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