This disorder is very common in the general population ranging from 1% to 2%. It is more common women than in men, by as much as 3:1.

40-71% of Borderline patient report having been sexually abused. Research indicates the environmental stress, neglect, abuse and separation from caregivers as young children are one of the may risk factors that trigger the onset of the disorder. Some studies of twins and families suggest that personality disorders may be inherited. Research also showed that certain neurotransmitters that are involve in regulation of mood are not working properly in certain parts of brain in people with Borderline Personality Disorder.

The general profile of the disorder typically includes a pervasive instability in mood, extreme "black and white" thinking, or "splitting", chaotic and unstable interpersonal relationships, self-image, identity, and behavior, as well as a disturbance in the individual's sense of self. They also have inappropriate anger, sometimes escalating into physical confrontations. People with BPD also often engage in suicidal behavior or deliberately injure themselves for emotional relief.

If not treated the person with borderline personality disorder has immense problems with their relationships, they enter in a chaotic relationship, they are at high risk of being abused. They have problems at work. They are also at high risk of getting depressed and anxious. Some also start using more alcohol or other recreational drugs. Because of their risky, impulsive behavior, people with BPD are also more vulnerable to unplanned pregnancies, sexually transmitted diseases, motor vehicle accidents and physical fights. They are also at a higher risk of committing suicide.

If treated properly they can live a perfectly normal life. They can manage their emotions and impulsivity with long term treatment.

Treatment mostly focuses on psychotherapy which aims to help people with borderline personality disorder to handle their emotions, not to act impulsively, control their suicide thoughts. The main therapy that is being used worldwide is Dialectical Behavioral Therapy (DBT). Other therapies that can be used are:

• Cognitive Behavioral Therapy
• Psychoanalysis
• Transference Focused Psychotherapy

They are also treated with medications to help them with their depression, anxiety and impulsivity.

If they have suicidal thoughts then they are hospitalized for a short duration of time.