bipolar is a condition where you experience a form of mania (be it any emotion) for a week to 2 months and then fall into a depression for anytime over a month. a mania is a time where you spend excess energy on everything and all feelings are more intense. a bipolar depression is also called a true depression, and is a lack of energy (not sad feeling), often leading to a loss of appetite, a difficulty in academics or work, and in more intense cases a patient can enter a state where they do not move.