当你哭泣时，你的身体会发生什么变化?

当你哭泣时，你的身体会发生什么变化?

Whether triggered by sad movies or happy reunions, stubbed toes or allergies, crying seems to serve many purposes. A salty fluid flows across the surface of your eyes and eventually, you feel better.

无论是由悲伤的电影还是快乐的团聚、被撞伤的脚趾还是过敏引起的，哭似乎有很多作用。一种含盐的液体流过你的眼睛，最终，你感觉好多了。

While other animals have tears, humans are the only animals whose watery eyes can be triggered by emotions. Yet Charles Darwin, the father of evolution, once said that weeping was "purposeless." Nearly 150 years later, emotional crying is still one of the body's most perplexing mysteries, Time points out.

虽然其他动物也有眼泪，但人类是唯一会因情绪而流泪的动物。然而，进化论之父查尔斯·达尔文曾经说过，哭泣是“没有目的的”。《时代》杂志指出，近150年后，情感上的哭泣仍然是人体最令人困惑的谜团之一。

From stress relief to social bonding, tears serve many purposes. (Photo: aastock/Shutterstock)

Types of tears

眼泪的种类

Basal tears — These are in your eyes all the time, keeping them from drying out and protecting your cornea.

基底眼泪——这些东西一直在你的眼睛里，防止它们变干，保护你的角膜。

Reflex tears — These tears are triggered when your eyes are hit with irritants like smoke, dust or onion fumes and they need to be washed away.

反射性眼泪——当你的眼睛被烟、灰尘或洋葱味等刺激物刺激时，眼泪就会被触发，这些刺激物需要被冲洗掉。

Emotional tears — We produce these tears when we are overcome with all sorts of emotions ranging from joy and sadness to fear and stress.

情绪化的眼泪——当我们被各种各样的情绪(从喜悦、悲伤到恐惧和压力)所征服时，我们就会流泪。

Babies cry to communicate their needs. (Photo: nikkos/Shutterstock)

Benefits of crying

哭的好处

Getting attention — Babies cry to let us know they need something and to get people to pay attention. Boys and girls cry about the same amount, although as they age, women reportedly tend to cry more than men, according to Berkeley Wellness.

吸引注意——婴儿哭是为了让我们知道他们需要什么，并让人们注意他们。伯克利健康研究中心的数据显示，男孩和女孩的哭泣量大致相同，但据报道，随着年龄的增长，女性往往比男性哭得更多。

Easing stress — Some researchers believe that crying releases stress hormones and other toxic substances that can build up during stress.Some research says that holding back tears is linked to a higher risk of heart disease and high blood pressure, while other studies show that people who have conditions like ulcers and colitis are less likely to cry than people without those illnesses.

缓解压力——一些研究人员认为，哭泣会释放压力荷尔蒙和其他有毒物质，这些物质是在压力下积聚的。一些研究表明，忍住眼泪会增加患心脏病和高血压的风险，而另一些研究表明，患有溃疡和结肠炎等疾病的人比没有这些疾病的人更不容易流泪。

Social bonding — Some studies have found that emotional tears can strengthen relationships.

社会关系——一些研究发现，情感上的眼泪可以加强人际关系。

Manipulation — Babies learn at about 9 months that they can get you to do something for them by crying, according to WebMD.

操控——据WebMD报道，婴儿在9个月大的时候就学会了可以通过哭泣让你为他们做一些事情。