Manic-depressive psychosis is a mental health condition characterized by extreme mood swings, with episodes of manic highs and depressive lows. This condition is also commonly known as bipolar disorder. There are several synonyms that are often used to describe this condition, such as bipolar affective disorder, manic-depressive illness, and bipolar mood disorder. These terms reflect different aspects of the condition and may be used interchangeably depending on the context. While there are different types of bipolar disorder, all involve significant changes in mood, energy levels, and behavior. Effective treatment options are available for people with manic-depressive psychosis, and early intervention can help improve outcomes and quality of life.