Participants with a history of fidgety, body-focused behaviors reported greater urges to engage in those behaviors when they were feeling stressed and frustrated. But they didn't report feeling those urges while they were relaxing.

研究表明，有烦躁不安、身体强迫症病史的参与者感到压力大、沮丧时，会有更急切的愿望想要做出那些强迫行为。但是他们放松的时候，并没有表现出这种急切。

If you do bite your nails from time to time, there's no need to worry - you're probably not doing much harm. In fact, the researchers say that such behaviors serve a temporary purpose when we're not able to channel our energy more productively.

如果你时不时会咬指甲，没有什么可担心的——这可能不会有太大的伤害。研究人员表示，事实上，当人们无法充分释放自己的能量来做成一些事情时，这些行为可以暂时帮助人们排解。

"The positive effects of the habits are stimulation and a (maladaptive) way of regulating emotion," O'Connor said in an email to The Huffington Post. "What triggers the habit is largely frustration and impatience so the action substitutes for more constructive action."

“这些习惯的正面影响是刺激和(适应不良时的)情绪控制方式，奥康纳在写给赫芬顿邮报的邮件中说道。“出现这些习惯很大程度上是由于沮丧和缺乏耐心，所以这些行为代替了更具建设性的行为。

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