October 2024 in “Skin Appendage Disorders” This study found no overall side preference for hair growth on the scalp, yet many healthy individuals tend to grow more hair on one side, suggesting that genetics and possibly behavioral or environmental factors may influence this pattern.
84 citations
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October 2005 in “Annals of Clinical Psychiatry” This review examines the existing research on pathologic hairpulling, skin picking, and nail biting, suggesting these behaviors are underrecognized and may benefit from a unified diagnostic categorization; it reports no new clinical findings.
12 citations
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December 2020 in “Journal of The American Academy of Dermatology” In this study, individuals with body-focused repetitive behaviors reported increased symptoms during the COVID-19 pandemic, highlighting the psychological impact of pandemic-related societal changes on this population.
8 citations
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February 2021 in “Comprehensive psychiatry” This study found that adults with trichotillomania or skin picking disorder experienced significantly poorer sleep quality, which was linked to various factors including age, stress, distress tolerance, impulsivity, and comorbid mental disorders.
5 citations
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August 2023 in “Skin Research and Technology” In this study, fMRI results suggested that mechanical stimulation evoked a stronger prickle sensation comprising both pain and itch on hairy skin compared to glabrous skin.