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Never a happy topic, bed wetting is a very distressing problemfor five to seven million American kids.
尿床可是個不愉快的話題。尿床困擾著500萬至700萬名美國兒童。
If we can't explain whysome people like to pick on these kids, can we at least shedsome light on what causes bed wetting?
如果我們無法解釋為什么偏偏這些兒童尿床，那么我們至少探究下尿床的原因吧！
At one time, people punished bed-wetters for acting badly, but today scientists believe that thiscondition has several physical causes.
以前，經(jīng)常尿床的兒童會被罰。但是，如今科學(xué)家相信尿床是基于生理因素。
Some kids suffer from problems like infections or anatomical defects that can be easily identified and treated.
一些兒童患常見可治愈傳染病或結(jié)構(gòu)缺陷。
Other causes are harder to pin down.
其它原因就很難下定論了。
One promising area of research is on the kidney hormoneADH.
有種可行性研究的方向是腎臟激素：抗利尿激素。
We all produce more ADHhormone at night.
夜晚人體分泌的抗利尿激素較多。
ADH signals the kidney toslow down production.
抗利尿激素向腎臟發(fā)出減慢新陳代謝的信號。
This is why we don't go to the bathroom for eight hours at night but couldnever last that long between bathroom breaks during the day.
這是為什么我們夜晚八小時不上廁所，但是白天上廁所的間隔時間卻更短。
Some children who wet their bedsdo not produce enough ADH at night.
一些兒童尿床是因為夜晚沒有分泌足夠的抗利尿激素。
When given drugs that boost this hormone, they stopbed wetting.
服用藥物促進抗利尿激素分泌就可以治療兒童尿床。
Finally, some kids simply have small bladders and an undeveloped nervous system.
另外，有些兒童尿床僅僅是因為膀胱小且神經(jīng)系統(tǒng)發(fā)育不完善。
The goodnews is that these kids, like most bedwetters, will grow out of it as their bodies develop andmature.
可喜的是隨著身體機能的發(fā)育和成熟，大多數(shù)尿床兒童不再尿床。
