Department of Psychology, Harvard University, Cambridge, MA 02138, USA.
Personal Disord. 2010 Jul;1(3):170-9. doi: 10.1037/a0020106.
People who engage in self-injurious behaviors such as cutting and burning may have altered pain perception. Using a community sample, we examined group differences in pain threshold and pain endurance between participants who self-injured and control participants who were exposed to pressure pain applied to the finger. Participants who self-injured had higher pain thresholds (time to report pain) and endured pain for longer than control participants. Among participants who self-injured, those with longer histories of self-injury had higher pain thresholds. Duration of self-injury was unrelated to pain endurance. Instead, greater pain endurance was predicted by higher levels of introversion and neuroticism and by more negative beliefs about one's self-worth. A highly self-critical cognitive style was the strongest predictor of prolonged pain endurance. People who self-injure may regard suffering and pain as something that they deserve. Our findings also have implications for understanding factors that might be involved in the development and maintenance of self-injury.
有自伤行为（如切割、灼伤）的人可能会改变对疼痛的感知。本研究使用社区样本，考察了在手指受到压力疼痛时，自伤者和经历过相同压力但未自伤者之间的疼痛阈和疼痛耐受力的组间差异。自伤者的疼痛阈（报告疼痛的时间）更高，疼痛耐受力也更强。在自伤者中，自伤史较长者的疼痛阈更高。自伤持续时间与疼痛耐受力无关，而内向、神经质水平较高，对自我价值的消极信念较多则预示着更强的疼痛耐受力。高度自我批评的认知风格是延长疼痛耐受力的最强预测因素。自伤者可能会认为痛苦和疼痛是他们应得的。我们的研究结果对于理解可能涉及自伤发展和维持的因素也具有重要意义。
