Personality Disorder NOS Causes

(Also Known As: Personality Disorder Causes, Personality Disorders Causes, Borderline Personality Disorder Causes, Mixed Personality Disorder Causes)

(Reviewed by: Paul Peterson, Licensed Therapist)

What are the causes of Personality Disorders?

Borderline Personality Disorder

Patients with borderline personality disorder stand on the border between neurosis and psychosis. They are described to have extraordinarily unstable affect, mood, behavior, object relations and self-image. As with other mental disorders, the causes of BPD are complex and unknown. However, one researcher believes that BPD results from a combination of psychological factors which may involve a traumatic childhood, a vulnerable temperament, and stressful maturational events during adolescence or adulthood. Additionally, scientific researches have indicated varied possible causes, which include the following: genetic predisposition, neurobiological factors, environmental factors and brain abnormalities.

Some comorbid or co-occurring conditions consist of mental disorders such as substance abuse, depression and other mood, and personality disorders. BPD is one of four diagnoses classified as cluster B (dramatic-erratic) personality disorders typified by disturbances in impulse control and emotional dysregulation, the others being narcissistic, histrionic, and antisocial personality disorders. 4

Personality Disorders NOS

Psychological theories, biological theories and genetic predisposition may be involved in the onset of personality disorders NOS.

  • Psychological theories: early loss, poor parenting, punitive superegos and extreme feelings of guilt.
  • Biological theories: hypothalamic-pituitary-adrenal-thyroid axis including noradrenergic and serotonergic amine systems.
  • Genetic predisposition: temparament

Could You Have Personality Disorder NOS?

Personality Disorder NOS Topics

Related Conditions

Antisocial Personality Disorder – pervasive behavior, disregard of rights of others, lack of empathy
Avoidant Personality Disorder – pervasive social inhibition, feeling of inadequacy, fear of being criticized or rejected
Borderline Personality Disorder – variable mood, unstable relationship, psychosis
Dependent Personality Disorder - dependence towards others, get others to assume responsibility for major areas of their lives, lacks self-confidence, may experience intense discomfort when left alone for more than a brief period
Histrionic Personality Disorder - exhibits excitability and are highly emotional, manifests a colorful, dramatic, extroverted behavior with the inability to maintain long-lasting attachments.
Narcissistic Personality Disorder - characterized by a heightened sense of self-importance and grandiose feelings of uniqueness
Obsessive Compulsive Disorder – obsession to perfection, compulsive personality, obsession, perfectionist, routine and repetitive activities
Paranoid Personality Disorder – long standing suspiciousness, mistrust of others, paranoia, maladaptive behavior
Schizoid Personality Disorder – lack of interest with social relationship, prefer to be in solitary, emotional coldness, indifference
Schizotypal Personality Disorder - odd personality, perceives magical thinking, peculiar notions, ideas of reference, illusions and derealization.