Mood disorder

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The mood disorder diagnoses are essentially defined as patterns of mood disturbances observed through time. Clinicians choose from among the various mood-related diagnoses on the basis of their observation of patients' sequence of mood episodes. Most people with mood disorders have a history of multiple mood episodes. Individual mood episodes last for several weeks or months and then give way to normal mood, or to another mood episode. The mood disorders are all similar but they all have something to do with disordered mood, and more specifically, with depressed mood. They are distinguished by the extent and severity of a person's mood disturbance, and by the direction (up or down) of the moods involved