Bipolar disorder, a type of mood disorder characterized by an ongoing combination of extreme highs and extreme lows. An episode of mania is an abnormally elevated or expansive mood, and feelings of euphoria are an exaggerated sense of well-being. The highs may alternate with lows, or both extremes may be felt at about the same time. BP is a major mood disorder with a distinct period during which the predominant mood is elevated, expansive, or irritable, accompanied by symptoms such as hyperactivity, pressured speech , racing thoughts, inflated self -esteem, decreased need for sleep, distractibility, and excessive involvement in potentially dangerous self-destructive activity.
Personality Disorder , a serious mental illness characterized by pervasive instability in moods , interpersonal relationships, self -image, and behavior . This instability usually disrupts family and work life, long-term planning, and the individual's sense of self-identity.