Bedwetting affects from 5 to 7 million children between the ages of 3 and 12. Causes may vary, but it is usually from normal bladder development. It is sometimes called nocturnal enuresis. One in six children suffers from it. It is developmental and will go away with time. Although some people don't believe it, you cannot train your child to not wet the bed overnight. Drinking water just before bedtime does not necessarily make bedwetting occur either. Parents cannot control this problem. Staying dry overnight is a physiological accomplishment and cannot be taught the way daytime potty training is handled.