DefinitionBorderline personality disorder is a condition in which a person makes impulsive actions, and has an unstable mood and chaotic relationships.Alternative NamesPersonality disorder - borderlineCauses, incidence, and risk factorsPersonality disorders are long-term (chronic) patterns of behavior that negatively affect relationships and work. The cause of borderline personality disorder (BPD) is unknown. People with BPD are impulsive in areas that have a potential for self-harm, such as drug use, drinking, and other risk-taking behaviors.Risk factors for BPD include:Abandonment in childhood or adolescenceDisrupted family lifePoor communication in the familySexual abuseThis personality disorder tends to occur more often in women and among hospitalized psychiatric patients.SymptomsRelat