背景介绍

【背景】

经常舔嘴唇

嘴唇干燥不舒服，很多人会下意识地舔唇，结果却往往越舔越干，越干越舔，形成一个恶性循环，甚至舔得口唇周围皮肤粗糙变厚，甚至嘴唇肿胀，形成医学上的“舌舔皮炎”。无论是从健康还是美观的角度考虑，还是改掉舔唇这个不太雅观的习惯吧。

购买没有品质保证的唇膏

由于廉价唇膏里含有大量未经仔细提纯的油和太多的蜡，其中一些是不稳定的动植物天然油脂，很容易氧化后发出异味；太多的蜡质，会影响唇部皮肤的新陈代谢。所以一定要选择知名品牌，这样才能保证买到的唇膏原料纯净，功效突出。

做防晒保护时忘记嘴唇

嘴唇的皮肤没有色素保护，颜色又比其他部位的皮肤深，所以，最容易吸收紫外线。因此无论什么季节，都要选用有防晒成分的唇膏。

摘自百度贴吧

英文原文

【英文原文】

Why lips go dry.

Let’s start by reviewing the ways in which the surface of our lips is different from the surface of the skin on the rest of our bodies. Basically, our lips are made of the same mucus membrane that coats the inside of our mouths. This means two things.

First, our lips don’t have the same protective outer layer as the skin elsewhere on our bodies. This layer is part of the barrier to evaporation, and its absence means our lip skin retains less fluid. Second, our lips don’t have the same glands and pigments as ordinary skin. For example, lips don’t have oil glands, which also help keep moisture from evaporating, and they contain less melanin, the pigment that helps protect our skin from sunburn.

What this means is that our lips have little to no protection from the environment, and their main source of moisture is the saliva that comes from our mouths. What’s more, unlike much of the rest of our body, our lips are almost always on display, and rarely covered by clothing. As a result, the moisture on our lips is continually evaporating. And that’s before we take into account exposure to sun, wind, cold, and air-conditioning. Plus, if you’re sick or have allergies, and your nose is congested, your lips end up drying more quickly because you tend to breathe through your mouth.

【词汇讲解】

(可可英语版权所有,未经允许请勿转载)