If your child is wetting the bed longer than normal, PLEASE take the child for allergy tests. I wet the bed until age fourteen, and we never knew why, my parents put me through Hell over it. Then when I had a son he wet the bed until second grade. I happen to read a book that said that when a child's nose is plugged up he wakes up and the bladder releases and the bed is wet. When he goes back to sleep that bladder tenses back up, but each time the plugged up nose wakes the child up over and over this just repeats itself. Depriving the child of fluids doesn't work either.