Even without any treatment this gradually improves, getting less frequent with age.
Enuresis often runs in families.
While it occurs frequently in both sexes, it is somewhat more common in boys. Instead it is a functional, developmental phenomenon. In the rare cases when this isn't true other symptoms, behavioral or physical, are usually present. This just postpones the day when the child finally outgrows it themselves. DON'T use pull-ups or diapers.