Trichotillomania: New Study Explains Why People Feel Compelled to Pull Out Their Own Hair

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Trichotillomania, or hair-pulling disorder, has plagued humanity for centuries, with references dating back to ancient Greece. This body-focused repetitive behavior affects between 1-2 percent of Americans equally across genders and frequently occurs alongside anxiety, depression, and other mental health conditions. While researchers have traditionally attributed hair pulling to emotional regulation—suggesting people pull hair to manage stress and anxiety—recent evidence challenges this explanation, as the behavior can occur even when individuals are unaware they are doing it.

Scientists at Heidelberg University Hospital conducted a 10-day study tracking 61 adults with trichotillomania using real-time assessments rather than relying on participants’ daily recollections. Participants received seven daily prompts asking about their emotional state, urge intensity, and hair-pulling episodes. The researchers collected 2,557 assessments documenting 702 pulling incidents, revealing that stronger urges significantly predicted hair-pulling behavior more reliably than emotional distress alone.

Surprisingly, the findings point to a different mechanism entirely. While negative emotions like anxiety and anger did correlate with stronger urges, boredom emerged as the most predictive factor for both urges and actual pulling episodes. Tiredness also predicted stronger urges, suggesting that under-stimulation and low-energy states may drive the behavior as much as emotional distress. This discovery indicates that hair pulling may relate to regulating internal stimulation levels during periods of boredom or fatigue, rather than purely managing negative emotions.

Researchers acknowledge their study’s limitations, including its small, predominantly female sample and intensive monitoring requirements. However, their findings suggest that understanding trichotillomania requires examining what occurs between an urge and action—including environmental cues, sensory experiences, and awareness itself—rather than assuming emotional dysregulation as the sole cause.

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Originally reported by Sciencealert →