The cause is likely due to one or a combination of the following:
- The child cannot yet hold urine for the entire night.
- The child does not waken when his or her bladder is full.
- The child produces a large amount of urine during the evening and night hours.
- The child has poor daytime toilet habits. Many children habitually ignore the urge to urinate and put off urinating as long as they possibly can. Parents usually are familiar with the leg crossing, face straining, squirming, squatting, and groin holding that children use to hold back urine.