The depression is mood problems arise!

而抑郁症是心境方面出现的问题！

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Moreover, cognitive and mood problems may not be the only consequences of too little sleep.

不仅如此，睡眠过少的后果可能不只是认知能力和情绪问题。

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More than half of children who use electronic media before bedtime may have mood or learning problems during the day, a preliminary study of 40 young people suggests.

一项对40名孩子的初步研究表明，睡前使用电子媒体的孩子大约会有一半人在第二天出现情绪或学习上的问题。

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Failure to do this effectively may be the root of some post-natal mood problems, they said.

BBC: Chemical clue to baby blues found

The main hormone produced during stress is cortisol, which causes aggression and and mood problems.

FORBES: Women Are Happier Than Men; Testosterone To Blame

For decades some doctors have complained these drugs are overused for mild mood problems.

FORBES