Everyone experiences phases of sadness, despondency, euphoria, and a lack of joy in life. The transition from normal mood fluctuations to a disorder that requires treatment is gradual. Action is needed when mood changes persist for an extended period and/or when those affected or their relatives feel impacted. This book for those affected is not intended to replace medical consultations but aims to expand the basic knowledge about mood swings, therapeutic approaches, and changes in lifestyle habits, so that those affected and their relatives can better manage the course of mood fluctuations in the future.