1. The medical term for bedwetting is “enuresis,” which refers to bedwetting that is not due to an abnormality of any portion of the urinary tract. Primary enuresis means the child has never been dry, whereas secondary enuresis is the term used for a child who has previously been dry but then starts wetting his bed. Bedwetting is sometimes referred to as “nocturnal enuresis” or “nightwetting.” Sometimes it’s called “sleep wetting,” since some children may also “nap wet.” Bedwetting really should be called “sleep wetting” because it occurs during sleep.
Eighty-five percent of children eventually outgrow bedwetting without treatment. In the teenage years, only two to five percent of children, or one child per class, continue to wet their bed. Bedwetting boys outnumber girls by a ratio of 4 to 1.
nor does it reflect a dysfunctional family. It is a problem of sleeping too deeply to be aware of bladder function.
If both parents were bedwetters, the child has a seventy- percent chance of being a bedwetter. If only one parent was wet at night, the child will have a forty- percent chance of following his parent’s nocturnal habit.
In early infancy, bladder-emptying occurs mostly by the bladder- emptying reflex. When the bladder reaches a certain fullness and the muscle has stretched to a certain point, these muscles automatically squeeze to empty the bladder. Sometime between 18 months and 2½ years, most children have an awareness of bladder fullness, the first step toward bladder control. Next, the child becomes aware that he can consciously inhibit the bladder-emptying reflex and hold in his urine. As a result of his urine-holding efforts, his bladder stretches and its capacity increases. When the child can consciously inhibit the bladder-emptying reflex, he achieves daytime bladder control. Nighttime control occurs when the child can unconsciously inhibit the bladder-emptying reflex.
The bedwetting child literally sleeps through his bladder signals. Delay in bladder control can occur if there is a delay in awareness of bladder fullness, a small bladder, or the bladder-emptying reflex continues to be strong well into later childhood.
These components of bladder maturity occur at different ages in different children. Bedwetting is simply a developmental lag in the mastering of a bodily skill. There are late walkers, late talkers, and late dry-nighters.
New insights into the cause of bedwetting validate what observant parents have long noted: “He sleeps so deeply, he doesn’t even know he’s wetting the bed.” These deep sleepers are not aware of their bladder sensation at night, let alone how to control it. In addition to bedwetters sleeping differently, the hormonal control of urination may act differently in some children.
the hormone that is released during sleep and concentrates the urine so that the kidneys produce less of it during sleep and the bladder doesn’t overfill.
The bladder fills with just enough urine at night so that it does not overfill and demand to be emptied. Bedwetters may overfill their bladder so the supply outweighs the demand, but because they are sleeping so soundly they just don’t tune into their bladder fullness.