Name: 什麼原因導致黑眼圈？| 黑眼圈的原因是什麼？ (What causes dark circles? | #aumsum)
Uploaded: 2021-01-14T08:10:33.000Z
Duration: 1 min 28 s
Description: 【看影片學英語】數萬部 YouTube 影片，搭配英漢字典即點即查，輕鬆掌握單字發音與用法，長久累積看電影不必再看字幕。

There are a number of reasons which cause dark circles.

Some of them are stress and lack of sleep.

Under these conditions, our body produces a hormone called cortisol.

Over time, cortisol constricts some blood vessels.

Dilates the others like the vessels around or under our eyes.

As a result, these blood vessels become bigger.

Now, when sunlight or any white light falls around our eyes.

Various colors which make up white light interact with the skin.

Blood vessels in such a way that they mostly reflect bluish light.

Now, as the skin around our eyes is thinner as compared to other parts of the body.

The big blood vessels that reflect bluish light are prominent.

This makes the area around or under our eyes appear darker, thus causing dark circles.

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