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验证码输入错误，请重新输入突然发现 脚指甲新长出来一层，变成了两层，其实二脚趾也是大脚趾这样，手一痒痒就撕下来了，恢复成了一_百度知道
突然发现 脚指甲新长出来一层，变成了两层，其实二脚趾也是大脚趾这样，手一痒痒就撕下来了，恢复成了一
//g.com/zhidao/wh%3D600%2C800/sign=fd041de8a21ea8d38a777c02a73a1c76/d0a20cf4ffb36adaf99a6://g，变成了两层.hiphotos://g.jpg" target="_blank" title="点击查看大图" class="ikqb_img_alink"><img class="ikqb_img" src="http，其实二脚趾也是大脚趾这样，求大神解答&#/zhidao/pic/item/d0a20cf4ffb36adaf99a6，不知道这是怎么回事.jpg" esrc="http，天渐渐暖和了;&#/zhidao/wh%3D450%2C600/sign=8fcafe2a2ecfc92b6e521/d0a20cf4ffb36adaf99a6;<a href="http，手一痒痒就撕下来了，恢复成了一层，美美的时候到了;&#128561.baidu.脚指甲新长出来一层;&#128561.baidu.hiphotos.baidu突然发现&nbsp，让我情何以堪
提问者采纳
脚趾甲退化 是由癣菌引起的
是让他自己长出来，还是怎么办？
他自己会慢慢的脱落
哦哦，谢谢&#128522;
脚趾甲不要剪的太短
容易真菌感染
提问者评价
太给力了，你的回答完美地解决了我的问题，非常感谢！
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出门在外也不愁人为什么有五个手指头脚趾头，五这个是怎么进化出来的？
脚趾头为什么和手指头一样多为什么是五为什么有长短？为啥一般齐呢为神马有指纹？脚趾头也有叶是老祖宗给我们提前制备出来的多维码吗好有先见…
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祖先吃了一颗海星。海星把DNA注入了祖先的DNA
四足动物的默认模板就是5个趾头。不是五个趾头的四足动物都是在演化过程中慢慢退化掉几个趾头的。所以大多数的四足动物都是五个趾头。也就是说鱼类演化成两栖类的时候就是五个趾头了，我们只是继承下这个性状而已。The condition of having no more than five fingers or toes--in this context, 'most species' means a subgroup of jawed vertebrates--probably evolved before the evolutionary divergence of amphibians (frogs, toads, salamanders and caecilians) and amniotes (birds, mammals, and reptiles in the loosest sense of the term). This event dates to approximately 340 million years ago in the Lower Carboniferous Period. Prior to this split, there is evidence of tetrapods from about 360 million years ago having limbs bearing arrays of six, seven and eight digits. Reduction from these polydactylous patterns to the more familiar arrangements of five or fewer digits accompanied the evolution of sophisticated wrist and ankle joints--both in terms of the number of bones present and the complex articulations among the constituent parts.Early evolutionary experiments in hexa- or octodactyly (that is, creatures having six or eight digits) were associated with rather simple limb skeletons, much like those present in the flippers of modern whales and dolphins. This might provide a functional clue about one of the reasons for digit number reduction, which is related to the functional demands of simple "walking" limbs. Unlike paddles, such limbs have to provide purchase on a range of substrates, provide the platform for an efficient push-off and allow some rotation relative to the lower and upper limb bones as the rest of the body travels onward. In the very few instances of secondarily evolved polydactylous limbs from the fossil record, the phenomenon is associated with aquatic taxa. The classic instance of this is in the paddles of ichthyosaurs, extinct fishlike marine reptiles that lived more than 65 million years ago.Is there really any good evidence that five, rather than, say, four or six, digits was biomechanically preferable for the common ancestor of modern tetrapods? The answer has to be "No," in part because a whole range of tetrapods have reduced their numbers of digits further still. In addition, we lack any six-digit examples to investigate. This leads to the second part of the answer, which is to note that although digit numbers can be reduced, they very rarely increase. In a general sense this trait reflects the developmental-evolutionary rule that it is easier to lose something than it is to regain it. Even so, given the immensity of evolutionary time and the extraordinary variety of vertebrate bodies, the striking absence of truly six-digit limbs in today's fauna highlights some sort of constraint. Moles' paws and pandas' thumbs are classic instances in which strangely re-modeled wrist bones serve as sixth digits and represent rather baroque solutions to the apparently straightforward task of growing an extra finger. Patterns of six (or more) digits can be achieved by laboratory-based developmental manipulations, some of which concern changes in gene activity that probably reflect transformations involved in the fin-to-limb evolutionary transition. Here might lie another part of the reason for the prevalence of five: pleiotropy, or the multiple effects of genes upon more than one physical characteristic. For instance, Hand-Foot-Genital syndrome is a rare condition in which, as the name implies, the genito-urinary tract and the limbs are malformed. Crucially, the genes responsible are within the set of those involved in digit number and patterning. Therefore, although this tells us nothing directly about the significance of digit number, it indicates something important about developmental stability: the mechanisms involved in patterning the tips of our limbs include those involved in our reproductive success. Thus, tweak at your peril我就不翻译了。当然古尔德对这个所有四足动物都有个五个手指的祖先的学说有所质疑。写了一篇THIS VIEW OF LIFEEight (or Fewer) Little Piggies
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社交帐号登录　　糖尿病足常表现为下肢及足部冰凉，有时小腿抽筋，严重者下肢疼痛甚至出现跛行。糖尿病足是一个慢性进展的过程，初期可以出现下肢及足部异常感觉，如麻木、灼热、疼痛或针刺样痛等。还有许多患者因为神经功能障碍而无疼痛感觉，发生脚部烫伤、烧伤、碰撞伤甚至溃疡，经久不愈导致溃烂。济南糖尿病医院采用“捷生”保足疗法不截肢治疗好糖尿病足。　　“捷生”保足疗法不截肢治疗糖尿病足　　济南糖尿病医院独创“捷生”保足疗法，针对不同的患者制定不同的诊疗方案。糖尿病足患者最棘手的问题在于创面难以愈合，最后导致感染、坏疽、截肢。“捷生”保足疗法可以控制糖尿病、改善微循环、疏通大血管、抗感染、纠正各种相关急慢性并发症。患者身体机能、免疫能力得到恢复和提升，循环及微循环得到明显改善，感染和糖尿病得到进一步控制，相关并发症得到基本纠正，坏死组织逐渐清除，分泌物明显减少，新生肉芽组织开始生长，让患者免除截肢的痛苦。　　“捷生”保足疗法治疗糖尿病足康复病例　　马娇今年35岁了，孩子今年也10岁了，应该说上有老下有小，正当年的时候，但是她却被糖尿病足折磨的生不如死。马娇是辽宁人，在患病的这几年中她跑遍了辽宁省大大小小的医院，在辽宁省人民医院住院一个多月，没有效果，又转到中国医科大学附属第一医院，医生建议截肢，听到这个消息，不仅马娇承受不住就连她的母亲也受不了。马娇的母亲每天以泪洗面，她不能看到自己的女儿被截肢。　　正当一家人一筹莫展的时候，马娇的爸爸听说济南糖尿病医院可以不截肢治疗糖尿病足，于是马娇的父母二话不说带着马娇就从辽宁赶到济南，就是有一丝希望他们也不会放过!做了20多个小时的车，一家人终于来到济南糖尿病医院，一进门他们就跟济南糖尿病医院的医生聊了起来。功夫不负有心人，济南糖尿病医院的周燕主任说马娇在这里完全可以不截肢!马娇一听说真的可以不截肢高兴的像个孩子一样。　　医生采用“捷生”保足疗法为其治疗，马娇住院第14天，感染已经得到了完全控制，创面的肉芽组织已经明显生长了出来，马娇母亲看到女儿病情好转别提多高兴了，马娇自己也觉得轻松了许多。　　马娇住院的第34天，是她康复出院的日子。马娇及母亲特别感谢济南糖尿病医院的医护人员在这30多天对她们母女的照顾，送锦旗感谢医生治好了她的脚。　　马娇康复了，她是幸运的，因为她提早来到了济南糖尿病医院，保住了脚，免受截肢之苦，重新回归正常的生活，我们祝愿马娇以后的生活越来越好。也希望广大糖尿病足患者尽早治疗，不要一拖再拖，抓住治疗的黄金时间，重新拥有健康体魄!　　温馨提示：对于糖尿病足一定要进行及时系统的治疗，以免错过了治疗的最好时机，造成更加严重的后果。济南糖尿病医院创建于1992年，是国内最早致力于糖尿病研究与治疗的专科医院。如果您有任何疑问，可以点击阅读原文在线咨询或直接拨打专家咨询热线：6，权威专家免费为您答疑解惑!↓↓↓ 点击“阅读原文”在线咨询糖友健康之家(A)　
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