Mania (from Greek μανία from μαίνομαι - mainomai, "to rage, to be furious") is a state of abnormally elevated or irritable mood, arousal, and/ or energy levels, which is a criterion for certain psychiatric diagnoses. There are several possible causes for mania including drug abuse and brain tumors, but it's most often associated with bipolar disorder, where episodes of mania alternate with episodes of major depression. These cycle… (More on Mania)