Our expert says:
Nobody knows for sure. The traditional point of view would be that it seems to be related to emotional release in the sense of giving us a way to express sorrow , but I have seen some articles suggesting that it may also have a chemical aspect, including a release within tears of some substances that otherwise contribute to feeling bad. I'll look into it, and if I find something good on this, I'll do an article for H24 on this topic. Thanks for suggesting it
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