This is usually not a cause of concern until the child is past the age of five.
Most children seem to wet more at night.
This may be related to the way the human develops self control of the urinary system and the bowels. It is felt by some that enuresis may be delay in the development of control and that no other abnormality exists in the child. Sometimes children may start to be wet after they have been dry for some time. This is usually related to periods of stress. It is well known that enuresis runs in families.