- In major depression, sometimes referred to as unipolar or
clinical depression, people have some or all of the symptoms listed below for at least 2 weeks but frequently for several months or longer. Episodes of the illness can occur once, twice, or several times in a lifetime.
- In dysthymia, the same symptoms are present though milder
and last at least 2 years. People with dysthymia are frequently lacking in zest and enthusiasm for life, living a joyless and fatigued existence that seems almost a natural outgrowth of their personalities. They also can experience major depressive episodes.
- Manic-depression, or bipolar disorder, is not nearly as common as other forms of depressive illness and involves disruptive cycles of depressive symptoms that alternate with mania. During manic episodes, people may become overly active, talkative, euphoric, irritable, spend money irresponsibly, and get involved in sexual misadventures. In some people, a milder form of mania, called hypomania, alternates with depressive episodes. Unlike other mood disorders, women and men are equally vulnerable to bipolar disorder; however, women with bipolar disorder tend to have more episodes of depression and fewer episodes of mania or hypomania.5
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Sources:
NIMH
