According to [[medical science]], having an excessive amount of unhappiness in one's overall emotional life can have adverse effects on and individual.<ref>
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*[https://www.nm.org/healthbeat/healthy-tips/how-happiness-impacts-health How Happiness Impacts Health], Northwestern Medicine
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*[https://www.hsph.harvard.edu/news/magazine/happiness-stress-heart-disease/ Happiness & health], Harvard School of Public Health
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*[https://www.torrancememorial.org/healthy-living/blog/the-importance-of-happiness/ The Importance of Happiness]</ref> See also: [[Happiness and health]]