大家好，下面小编给大家分享一下为什么很多人还是不知道为什么要饭前便后洗手。下面详细解释一下。现在让我们来看看！

饭前便后洗手的原因如下。

1.无论大小便，都要上厕所。在厕所里，尤其是公共厕所里，空空气中含有大量的细菌。而这些细菌大部分都是可以让人生病的细菌。

2、如大肠杆菌、志贺氏菌等。这种细菌属于人体肠道寄生细菌，在大小便时随粪便排出，当然在厕所里更常见。上厕所的时候，手上难免会沾上细菌。

3.如果排便后不洗手，细菌会留在手上。当你吃东西的时候，细菌会随着食物通过你的手进入你的身体，让你生病。所以记住，排便后一定要洗手。有的人不认真洗手，只是用清水冲洗一下手，就算洗完了，所以不能洗手。

4.用肥皂洗手，仔细揉搓。肥皂是一种化学物质，呈碱性，有杀菌作用。其他的肥皂泡也能卷起细菌带走。最好用流动的水洗手，以免再次被脏水污染。

5.至于饭前洗手的原因，同上，也是为了防止吃饭时脏手的细菌被吃进肚子里。俗话说“病从口入”，就是这个道理。

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以上解释了饭前便后要洗手的原因。这篇文章已经分享到这里了。希望能帮到大家。如果信息有误，请联系边肖进行更正。