Final answer:
Primary nocturnal enuresis is a condition in which a child regularly wets the bed at night even though they have previously achieved urinary continence. It is not related to a urinary tract infection and is not caused by an underlying medical condition.
Step-by-step explanation:
Primary nocturnal enuresis is a condition in which a child regularly wets the bed at night even though they have previously achieved urinary continence. It is different from normal bedwetting during toilet training. It is not typically related to a urinary tract infection. Rather, primary nocturnal enuresis is usually not caused by an underlying medical condition but instead is a result of the child's inability to wake up when their bladder is full during sleep.