There are different types of depression with varying severity of symptoms and longevity. Some may only appear in episodes while others stay around for life. Types of depression include major depression, dysthymia, bipolar disorder, seasonal affective disorder, psychotic depression, postpartum depression, situational depression and atypical depression.

Dysthymia, or chronic depression, is a type of depression – although mild – that lasts a long time. At any given moment at least three percent of the population suffers from dysthymia, and over a lifetime six percent of the population may suffer from a depressive disorder.

Read more at http://www.belmarrahealth.com/dysthymia-causes-symptoms-and-treatment/

Also http://www.belmarrahealth.com/infographics/infographic-depression-facts-...

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