The vast majority of us get past these dark thoughts and learn to cope with the trials of life.

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These dark thoughts come after reading the August 31 Nihon Keizei Shimbun editorial.

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But in sharp contrast to the euphoric highs, would come these random, disorienting and incredibly dark thoughts, sometimes two or three times a day.

CNN: When motherhood becomes a nightmare

Although in some cases, dark thoughts can be a severe and debilitating symptom of a postpartum anxiety or depressive disorder, usually they are just an unpleasant part of normal adjustment.

CNN: When motherhood becomes a nightmare

The ebullient musician, who plays a range of instruments including bass and violin, says he did not have much to be depressed about - but was unable to push dark thoughts away.

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