如果你觉得最近头发掉的厉害,那可能是这个原因
<p><span word="If">If</span> <span word="you">you</span>'<span word="ve">ve</span> <span word="been">been</span> <span word="staring">staring</span> <span word="at">at</span> <span word="your">your</span> <span word="brush">brush</span> <span word="or">or</span> <span word="your">your</span> <span word="shower">shower</span> <span word="drain">drain</span> <span word="and">and</span> <span word="feeling">feeling</span> <span word="like">like</span> <span word="you">you</span>'<span word="ve">ve</span> <span word="been">been</span> <span word="losing">losing</span> <span word="a">a</span> <span word="lot">lot</span> <span word="of">of</span> <span word="hair">hair</span> <span word="lately">lately</span>, <span word="don">don</span>'<span word="t">t</span> <span word="freak">freak</span> <span word="out">out</span>. <span word="A">A</span> <span word="new">new</span> <span word="British">British</span> <span word="Journal">Journal</span> <span word="of">of</span> <span word="Dermatology">Dermatology</span> <span word="study">study</span> <span word="suggests">suggests</span> <span word="that">that</span> <span word="shedding">shedding</span> <span word="more">more</span> <span word="strands">strands</span> <span word="in">in</span> <span word="the">the</span> <span word="summer">summer</span> <span word="and">and</span> <span word="fall">fall</span> <span word="is">is</span> <span word="totally">totally</span> <span word="normal">normal</span>.</p><p>如果最近你老是盯着梳子或浴室排水阀，感觉自己掉了很多头发，千万不要惊慌。英国《皮肤病学杂志》刊出的一项新研究表明：夏天和秋天头发掉的比较厉害是完全正常的。</p><p><span word="A">A</span> <span word="seasonal">seasonal</span> <span word="pattern">pattern</span> <span word="of">of</span> <span word="hair">hair</span> <span word="loss">loss</span> <span word="has">has</span> <span word="been">been</span> <span word="long">long</span> <span word="suspected">suspected</span>; <span word="it">it</span>'<span word="s">s</span> <span word="been">been</span> <span word="observed">observed</span> <span word="anecdotally">anecdotally</span> <span word="and">and</span> <span word="documented">documented</span> <span word="in">in</span> <span word="previous">previous</span> <span word="small">small</span> <span word="studies">studies</span>. <span word="But">But</span> <span word="those">those</span> <span word="studies">studies</span> <span word="have">have</span> <span word="focused">focused</span> <span word="on">on</span> <span word="just">just</span> <span word="one">one</span> <span word="geographic">geographic</span> <span word="location">location</span>, <span word="so">so</span> <span word="it">it</span> <span word="hasn">hasn</span>'<span word="t">t</span> <span word="been">been</span> <span word="possible">possible</span> <span word="to">to</span> <span word="know">know</span> <span word="if">if</span> <span word="those">those</span> <span word="findings">findings</span> <span word="apply">apply</span> <span word="to">to</span> <span word="everyone">everyone</span>.</p><p>长久以来，人们一直怀疑掉发有季节规律。先前的小型研究已经观察到了这种现象。但这些研究只在某一区域进行，所以并不清楚是否对所有人适用。</p>
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