Mood disorders are a section of diseases that represent a dangerous difference in attitude. Disorder under mood disorders involves a major depressive disorder, bipolar disorder (mania – euphoric, hyperactive, over-inflated ego, unrealistic optimism), persistent depressive disorder (long-lasting low-grade depression), cyclothymia (a mild form of bipolar disorder), and SAD (seasonal affective disorder).
If you have a mood disorder, your general touching state or mood is distorted or inconsistent with your conditions and interferes with your ability to function. You may be extremely sad, empty or irritable (depressed), or you may have periods of depression shifting with being very happy (mania).