Signs of Borderline Personality Disorder

8. Sudden fits of rage and aggression. This relates to impulsivity and the tendency for intense emotional reactions. 9. Possibly too casual about personal data, stories, etc. Unreasonably fast closeness with new people by sharing information, passwords, with a feeling of having found a close person, even though you've known each other for a couple of days. 10. Generally unstable mood, which primarily changes under the influence of external causes, even minor ones. 11. Additional sign - constantly getting into dubious and unsettling situations.