Borderline personality disorder (BPD) (called emotionally unstable personality disorder, emotional intensity disorder, or borderline type in the ICD-10) is a cluster-B personality disorder, the essential feature of which is a pattern of marked impulsivity and instability of affects, interpersonal relationships and self image. The pattern is present by early adulthood and occurs across a variety of situations and contexts. Other symptoms usually include intense fears of abandonment and intense 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 and suicidal behavior are common.