脚趾甲里显现部分黑色是什么原由？
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<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">双侧甲板<span style="color: black;">倘若</span>对<span style="color: black;">叫作</span><span style="color: black;">显现</span>甲板颜色的变化，基本上就<span style="color: black;">能够</span>排除<span style="color: black;">有些</span>特异性甲部<span style="color: black;">疾患</span>，<span style="color: black;">例如</span>甲母痣、恶黑等，<span style="color: black;">能够</span><span style="color: black;">思虑</span>甲板钝性<span style="color: black;">损害</span><span style="color: black;">导致</span>的局部淤血，以及灰指甲感染的初期征兆。</p>
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<h3 style="color: black; text-align: left; margin-bottom: 10px;">甲板钝性<span style="color: black;">损害</span><span style="color: black;">导致</span>的局部淤血</h3>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">咱们</span>的指甲属于皮肤的<span style="color: black;">附庸</span>结构，<span style="color: black;">因此呢</span>与皮肤<span style="color: black;">同样</span><span style="color: black;">饱含</span>角质蛋白，<span style="color: black;">然则</span>甲角蛋白和皮肤的角蛋白又是不<span style="color: black;">同样</span>的。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">皮肤角蛋白是软角蛋白，老化脱核后会变成角质层，在皮肤表面附着一段时间后，就会以皮屑、“搓灰”、脱皮等方式离开人体，生长代谢周期短。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">甲角蛋白是甲基产生的特殊蛋白，质硬，从甲根生发后会沿着甲床多层堆砌，并向指尖远端延伸生长，代谢周期长，<span style="color: black;">况且</span><span style="color: black;">很难</span>脱落<a style="color: black;"></a>。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">因此</span><span style="color: black;">倘若</span>皮肤<span style="color: black;">显现</span><span style="color: black;">损害</span>，会<span style="color: black;">第1</span>时间<span style="color: black;">暴露</span>出来，<span style="color: black;">状况</span>不严重的，三五天<span style="color: black;">亦</span>就好了。<span style="color: black;">然则</span><span style="color: black;">倘若</span>指甲受到<span style="color: black;">损害</span>，尤其是甲下的钝性<span style="color: black;">损害</span>，<span style="color: black;">咱们</span>是很难<span style="color: black;">即时</span><span style="color: black;">发掘</span>的。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">这种甲板<span style="color: black;">损害</span><span style="color: black;">常常</span>是<span style="color: black;">长时间</span>的压迫<span style="color: black;">导致</span>，属于慢性<span style="color: black;">损害</span>。甲部顶端的<span style="color: black;">连续</span>压迫和<span style="color: black;">控制</span>，会与指甲的自然生长形成对冲，这就会<span style="color: black;">导致</span>甲床毛细血管破碎<a style="color: black;"></a>。</p>
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<div style="color: black; text-align: left; margin-bottom: 10px;">该<span style="color: black;">照片</span>有可能会<span style="color: black;">导致</span>不适</div>
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</div>甲板钝性<span style="color: black;">损害</span>淤血<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">可是在甲板的压力<span style="color: black;">功效</span>下，甲下渗出的速度有限，除非渗血<span style="color: black;">累积</span>到<span style="color: black;">必定</span>程度<span style="color: black;">才可</span>被人肉眼观察到，</p>
<h2 style="color: black; text-align: left; margin-bottom: 10px;">参考</h2><a style="color: black;">^</a><span style="color: black;">赵文静，张晓凯. 指甲的显微结构观察与分析 .分析测试技术与仪器， 2013(03)：164-170</span><a style="color: black;">^</a><span style="color: black;">荣华.指甲伤的类型与形成机制<span style="color: black;">科研</span>.刑事技术，2006：8-10</span>
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