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The Complete Idiot's Guide to Managing Your Moods by John Preston

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Chapter 8
Biological Factors That Can Affect Negative Moods
In This Chapter
• Brain chemistry and emotional suffering
• Medical conditions that can lead to serious mood changes
• The effects of prescription and recreational drugs that can cause serious mood problems
 
Human beings have a very strong need to make sense of their experiences. When people feel sad, for example, most will search their minds for reasons. They will take stock of recent life events, past hurts, etc. Many times it’s obvious. There are clear-cut life events that explain the feeling. But sometimes it’s hard to really figure out why one is having an unpleasant mood. Sometimes it is not life events that trigger moods, but, rather, changes in brain functioning.
When medical illnesses ...

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