科学家告诉你儿童尿床的原因
<p><span word="Never">Never</span> <span word="a">a</span> <span word="happy">happy</span> <span word="topic">topic</span>, <span word="bed">bed</span> <span word="wetting">wetting</span> <span word="is">is</span> <span word="a">a</span> <span word="very">very</span> <span word="distressing">distressing</span> <span word="problem">problem</span> <span word="for">for</span> <span word="five">five</span> <span word="to">to</span> <span word="seven">seven</span> <span word="million">million</span> <span word="American">American</span> <span word="kids">kids</span>. <span word="If">If</span> <span word="we">we</span> <span word="can">can</span>’<span word="t">t</span> <span word="explain">explain</span> <span word="why">why</span> <span word="some">some</span> <span word="people">people</span> <span word="like">like</span> <span word="to">to</span> <span word="pick">pick</span> <span word="on">on</span> <span word="these">these</span> <span word="kids">kids</span>, <span word="can">can</span> <span word="we">we</span> <span word="at">at</span> <span word="least">least</span> <span word="shed">shed</span> <span word="some">some</span> <span word="light">light</span> <span word="on">on</span> <span word="what">what</span> <span word="causes">causes</span> <span word="bed">bed</span> <span word="wetting">wetting</span>?</p><p>尿床可是个不愉快的话题。尿床困扰着500万至700万名美国儿童。如果我们无法解释为什么偏偏这些儿童尿床，那么我们至少探究下尿床的原因吧！</p><p><span word="At">At</span> <span word="one">one</span> <span word="time">time</span>, <span word="people">people</span> <span word="punished">punished</span> <span word="bed">bed</span>-<span word="wetters">wetters</span> <span word="for">for</span> <span word="acting">acting</span> <span word="badly">badly</span>, <span word="but">but</span> <span word="today">today</span> <span word="scientists">scientists</span> <span word="believe">believe</span> <span word="that">that</span> <span word="this">this</span> <span word="conditionhas">conditionhas</span> <span word="several">several</span> <span word="physical">physical</span> <span word="causes">causes</span>. <span word="Some">Some</span> <span word="kids">kids</span> <span word="suffer">suffer</span> <span word="from">from</span> <span word="problems">problems</span> <span word="like">like</span> <span word="infections">infections</span> <span word="or">or</span> <span word="anatomical">anatomical</span> <span word="defects">defects</span> <span word="that">that</span> <span word="can">can</span> <span word="be">be</span> <span word="easily">easily</span> <span word="identified">identified</span> <span word="and">and</span> <span word="treated">treated</span>.</p><p>以前，经常尿床的儿童会被罚。但是，如今科学家相信尿床是基于生理因素。一些儿童患常见可治愈传染病或结构缺陷。</p><p><span word="Other">Other</span> <span word="causes">causes</span> <span word="are">are</span> <span word="harder">harder</span> <span word="to">to</span> <span word="pin">pin</span> <span word="down">down</span>. <span word="One">One</span> <span word="promising">promising</span> <span word="area">area</span> <span word="of">of</span> <span word="research">research</span> <span word="is">is</span> <span word="on">on</span> <span word="the">the</span> <span word="kidney">kidney</span> <span word="hormone">hormone</span> <span word="ADH">ADH</span>. <span word="We">We</span> <span word="all">all</span> <span word="produce">produce</span> <span word="more">more</span> <span word="ADH">ADH</span> <span word="hormone">hormone</span> <span word="at">at</span> <span word="night">night</span>. <span word="ADH">ADH</span> <span word="signals">signals</span> <span word="the">the</span> <span word="kidney">kidney</span> <span word="to">to</span> <span word="slow">slow</span> <span word="down">down</span> <span word="production">production</span>. <span word="This">This</span> <span word="is">is</span> <span word="why">why</span> <span word="we">we</span> <span word="don">don</span>’<span word="t">t</span> <span word="go">go</span> <span word="to">to</span> <span word="the">the</span> <span word="bathroom">bathroom</span> <span word="for">for</span> <span word="eight">eight</span> <span word="hours">hours</span> <span word="at">at</span> <span word="night">night</span> <span word="but">but</span> <span word="could">could</span> <span word="never">never</span> <span word="last">last</span> <span word="that">that</span> <span word="long">long</span> <span word="between">between</span> <span word="bathroom">bathroom</span> <span word="breaks">breaks</span> <span word="during">during</span> <span word="the">the</span> <span word="day">day</span>. <span word="Some">Some</span> <span word="children">children</span> <span word="who">who</span> <span word="wet">wet</span> <span word="their">their</span> <span word="beds">beds</span> <span word="do">do</span> <span word="not">not</span> <span word="produce">produce</span> <span word="enough">enough</span> <span word="ADH">ADH</span> <span word="at">at</span> <span word="night">night</span>. <span word="When">When</span> <span word="given">given</span> <span word="drugs">drugs</span> <span word="that">that</span> <span word="boost">boost</span> <span word="this">this</span> <span word="hormone">hormone</span>, <span word="they">they</span> <span word="stop">stop</span> <span word="bed">bed</span> <span word="wetting">wetting</span>.</p><p>其它原因就很难下定论了。有种可行性研究的方向是肾脏激素：抗利尿激素。夜晚人体分泌的抗利尿激素较多。抗利尿激素向肾脏发出减慢新陈代谢的信号。这是为什么我们夜晚八小时不上厕所，但是白天上厕所的间隔时间却更短。一些儿童尿床是因为夜晚没有分泌足够的抗利尿激素。服用药物促进抗利尿激素分泌就可以治疗儿童尿床。</p>
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