Bipolar disorder is characterized by two phases, depressive and mania. Bipolar depression refers to the “low” phase of bipolar disorder. It includes symptoms of low energy, loss of interest, sadness, suicidal thoughts, and fatigue. In the manic phase, someone may be prone to dangerous behavior, like excessive drinking, large item purchases, and multiple sexual partners.

What is major depressive disorder?

Who is at risk of developing depression?