Dermatophagia

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What Wikipedia says

Dermatophagia (from Ancient Greek δέρμα (derma) 'skin' and φαγεία (phageia) 'eating') or dermatodaxia (from δήξις (dexis) 'biting') is a compulsion disorder of gnawing or biting one's own skin, most commonly at the fingers. This action can either be conscious or unconscious and it is considered to be a type of pica.

Excerpt from the Wikipedia article “Dermatophagia”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

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