Negative emotions in response to daily stress take a toll on long-term mental health

"Psychological scientist Susan Charles of the University of California, Irvine and colleagues conducted the study in order to answer a long-standing question: Do daily emotional experiences add up to make the straw that breaks the camel's back, or do these experiences make us stronger and provide an inoculation against later distress?...

"...Findings show that mental health outcomes aren't only affected by major life events—they also bear the impact of seemingly minor emotional experiences. The study suggests that chronic nature of these negative emotions in response to daily stressors can take a toll on long-term mental health."

http://medicalxpress.com/news/2013-04-negative-emotions-response-daily-stress.html