Urinary incontinence in women.
Urinary incontinence is the inability to control the flow of urine from the bladder.
Urine is produced continuously by the kidneys. From each kidney the urine passes down a tube called a ureter into the bladder, which is a muscular sack in which urine is stored until it is expelled from the body. When your bladder is full, you have the sensation of needing to pass urine. This sensation occurs through the nerves in the bladder wall. When you pass urine, your sphincter muscle relaxes while your bladder wall muscles contract and the urine passes out through a tube called the urethra .