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Borderline personality disorder (BPD), also known as emotionally unstable personality disorder – impulsive or borderline type or emotional intensity disorder, is a personality disorder. The essential features include a pattern of impulsivity and instability of behaviors, interpersonal relationships, and self-image. There may be uncontrollable anger and depression. The pattern is present by early adulthood and occurs across a variety of situations and contexts. Other symptoms usually include intense fears of abandonment, extreme anger, and irritability, the reason for which others have difficulty understanding.〔 People with BPD often engage in idealization and devaluation of others, alternating between high positive regard and great disappointment. Self-harm, suicidal behavior, and substance abuse are common.〔 The disorder is recognized in the ''Diagnostic and Statistical Manual of Mental Disorders''. Since a personality disorder is a pervasive, enduring, and inflexible pattern of maladaptive inner experiences and pathological behavior, there is a general reluctance to diagnose personality disorders before adolescence or early adulthood. However, some practitioners emphasize that without early treatment, the symptoms may worsen. There is an ongoing debate about the terminology of this disorder, especially the suitability of the word "borderline".〔 The ICD-10 manual refers to the disorder as ''emotionally unstable personality disorder'' and has similar diagnostic criteria. In the DSM-5, the name of the disorder remains the same as in the previous editions.〔 ==Signs and symptoms== Borderline personality disorder may be characterized by the following signs and symptoms: *Splitting (thinking in extremes) *Chaos in relationships *Markedly disturbed sense of identity * Intense or uncontrollable emotional outbursts * Unstable interpersonal relationships and self-esteem * Concerns about abandonment * Self-damaging behavior * Impulsivity * Frequently accompanied by depression, anxiety, anger, substance abuse, or rage The most distinguishing symptoms of BPD are marked sensitivity to rejection, negative criticism, and thoughts and fears of possible abandonment.〔 Overall, the features of BPD include unusually intense sensitivity in relationships with others, difficulty regulating emotions, and impulsivity. Other symptoms may include feeling unsure of one's personal identity, morals, and values, having paranoid thoughts when feeling stressed, and severe dissociation.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Borderline personality disorder」の詳細全文を読む スポンサード リンク
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