Cluster B personality disorders are categorized as the "dramatic, emotional or erratic disorders". They include:

Antisocial personality disorder

• Characterised by a patterns of disregard and violation of the rights of other's. Individuals lack empathy and are often manipulative and impulsive.
• Aggressive and unremorseful
• Consistently irresponsible with failure to obey laws and social norms

Borderline personality disorder

• Pattern of abrupt mood swings, unstable relationships and instability in self-image
• Self harm is common
• Relationships alternate between idealization and devaluation (splitting)
• Inability to control temper and general affect

Histrionic personality disorder

• Characterised by attention seeking behaviours and excessive displays of emotions
• Often sexually inappropriate
• Shallow and self-dramatising
• Relationships are considered to be more intimate than they really are

Narcissistic personality disorder