We all have our ups and downs, but with bipolar disorder (once known as manic depression or manic-depressive disorder) these peaks and valleys are more severe. Bipolar disorder causes serious shifts in mood, energy, thinking, and behavior—from the highs of mania on one extreme, to the lows of depression on the other. More than just a fleeting good or bad mood, the cycles of bipolar disorder last for days, weeks, or months. And unlike ordinary mood swings, the mood changes of bipolar disorder are so intense that they can interfere with your job or school performance, damage your relationships, and disrupt your ability to function in daily life.
During a manic episode, you might impulsively quit your job, charge up huge amounts on credit cards, or feel rested after sleeping two hours. During a depressive episode, you might be too tired to get out of bed, and full of self-loathing and hopelessness over being unemployed and in debt.