A child's bladder is small and does not hold as much urine as an adult's bladder.

It helps to know a bit about how the bladder holds urine.

Babies don't have the "ability to hold urine and stool until they're at least 12 to 18 months old," McCoy says.

Inability to hold urine or to completely empty the bladder.

The child cannot yet hold urine for the entire night.

These muscles must work together to hold urine in the bladder most of the time and allow the bladder to empty when appropriate.

A large metal container on one side held urine.

It can also become difficult to hold urine or have a bowel movement.

Incontinence in women usually occurs because of problems with muscles that help to hold or release urine.

The bladder holds urine until it is passed out of the body.