In which psychological disorder might a person undergo extreme mood swings?

A person experiencing borderline personality disorder is characterized by extreme mood swings, which can shift rapidly, often in response to interpersonal stressors. These mood changes can range from deep feelings of euphoria to intense episodes of anger, anxiety, or despair, sometimes within a single day. This emotional instability is a core feature of borderline personality disorder and can significantly impact relationships and daily functioning.

In contrast, major depressive disorder typically involves prolonged periods of low mood rather than the rapid shifts found in borderline personality disorder. Obsessive-compulsive disorder centers around intrusive thoughts and compulsive behaviors rather than mood fluctuations. Schizophrenia primarily affects cognition and perception, leading to symptoms such as delusions and hallucinations, rather than mood variability. This understanding of the emotional landscape in borderline personality disorder highlights the complexities of mood regulation and interpersonal dynamics in those affected.