The phrase "emotional instability" refers to when a person has difficulty controlling their emotions and often experiences frequent and intense changes in their mood. Full definition
Previous studies have shown that people diagnosed with emotional instability disorders exhibit a decrease in the volume of certain brain areas. (sciencedaily.com)
Children who have suffered early abuse or neglect may later present with significant behavior problems including emotional instability, depression, and a tendency to be aggressive or violent with others. (pediatrics.aappublications.org)
The article describes the medical and psychosocial aspects of borderline personality disorder, a common and sometimes severe psychiatric condition marked by emotional instability and problems with interpersonal relationships. (content.iospress.com)