People bite their nails involuntarily due to underlying psychological and physiological triggers
the verdict
SUPPORTED
the evidence backs this
confidence 83/100
Nail biting (onychophagia) is formally recognized in psychodermatology as a body-focused repetitive behavior closely linked to underlying psychological and physiological factors such as stress, anxiety, and hereditary or environmental triggers.
Evidence for · 3
Update on Diagnosis and Management of Onychophagia and Onychotillomania.
2022 · cited by 17
Identifies onychophagia (nail biting) as a body-focused repetitive behavior disorder linked to comorbid psychiatric conditions and complex etiologies.
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More for · 2
Prevalence and correlates of onychophagia among Egyptian medical students: a cross-sectional study.
2025 · cited by 0
Demonstrates that chronic nail biting is significantly associated with psychological correlates such as perceived stress, fear of public spaces, and family history.