From the Vault: Fingernails, Part 1
Stuff To Blow Your Mind
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Nail Biting
Habitual nail biting is known clinically as onico pagia. Studies have found somewhere tween maybe 20 to 30 % of people in total do it, though it varies a lot by age. Even if you're not swallowing the nails, onicopagia can have a lot of negative consequences.
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