Pain perception in self-injurious patients with borderline personality disorder.

Pain ratings during the cold pressor test were significantly lower in female inpatients with borderline personality disorder who report that they do not experience pain during self-injury (BPD-NP group, n = 11), compared with similar patients who report that they do experience pain during self-injury (BPD-P group, n = 11), and normal female subjects (n = 6). Pain ratings were not significantly different in the BPD-P and normal control groups. Self-report ratings of depression, anger, anxiety, and confusion were significantly lower, and ratings of vigor significantly higher following the cold pressor test in the BPD-NP group, but not in the BPD-P group. Only anxiety was significantly lower in the normal control group following the cold pressor test. The implications and limitations of these preliminary findings are discussed.