SAD and Bipolar Disorder
Most people with SAD experience major depressive disorder, but as many as 20% may have or may go on to develop a bipolar disorder (manic-depressive disorder). It is important to discriminate the improved mood associated with recovery from the winter depression and a manic episode because there are important treatment differences. In these cases, people with SAD may experience depression during the winter and hypomania in the summer.
Read more about this topic: Seasonal Affective Disorder
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