Little research has been done to find evidence of what causes<unk> . Although direct causes are inconclusive, various theories and studies suggest multiple possible causes, of a neurochemical, genetic, psychoanalytic, or environmental nature. Traits such as extravagance, vanity, and seductiveness of hysteria have similar qualities to women diagnosed with HPD. HPD symptoms typically do not fully develop until the age of 15, while the onset of treatment only occurs, on average, at approximately 40 years of age. Neurochemical/physiological Studies have shown that there is a strong correlation between the function of neurotransmitters and the Cluster B personality disorders such as HPD. Individuals diagnosed with HPD have highly responsive noradrenergic systems which is responsible for the synthesis, storage, and release of the neurotransmitter, norepinephrine. High levels of norepinephrine leads to anxiety-proneness, dependency, and high sociability. Genetic Twin studies have aided in breaking down the genetic vs. environment debate. A twin study conducted by the Department of Psychology at Oslo University attempted to establish a correlation between genetic and Cluster B personality disorders. With a test sample of 221 twins, 92 monozygotic and 129 dizygotic, researchers interviewed the subjects using the Structured Clinical Interview for DSM-III-R Personality Disorders (SCID-II) and concluded that there was a correlation of 0.67 that<unk>  is hereditary. Psychoanalytic theory Though criticised as being unsupported by scientific evidence, psychoanalytic theories incriminate authoritarian or distant attitudes by one (mainly the mother) or both parents, along with conditional love based on expectations the child can never fully meet. Using psychoanalysis, Freud believed that lustfulness was a projection of the patient's lack of ability to love unconditionally and develop cognitively to maturity, and that such patients were overall emotionally shallow. He believed the reason for being unable to love could have resulted from a traumatic experience, such as the death of a close relative during childhood or divorce of one's parents, which gave the wrong impression of committed relationships. Exposure to one or multiple traumatic occurrences of a close friend or family member's leaving (via abandonment or mortality) would make the person unable to form true and affectionate attachments towards other people. HPD and antisocial personality disorder Another theory suggests a possible relationship between<unk>  and antisocial personality disorder. Research has found 2/3 of patients diagnosed with<unk>  also meet criteria similar to those of the antisocial personality disorder, which suggests both disorders based towards sex-type expressions may have the same underlying cause. Women are hypersexualized in the media consistently, ingraining thoughts that the only way women are to get attention is by exploiting themselves, and when seductiveness isn't enough, theatrics are the next step in achieving attention. Men can just as well be flirtatious towards multiple women / men yet feel no empathy or sense of compassion towards them. They may also become the center of attention by exhibiting the "Don Juan" macho figure as a role-play. Some family history studies have found that<unk> , as well as borderline and antisocial personality disorders, tend to run in families, but it is unclear how much is due to genetic versus environmental factors. Both examples suggest that predisposition could be a factor as to why certain people are diagnosed with<unk> , however little is known about whether or not the disorder is influenced by any biological compound or is genetically inheritable. Little research has been conducted to determine the biological sources, if any, of this disorder.
Histrionic personality disorder
Narcissistic personality disorder
Organic personality disorder
Haltlose personality disorder
Dependent personality disorder
Cluster B personality disorders
Depressive personality disorder
Self-defeating personality disorder