Nail Biting is an Undesirable Habit. Here are Some Ideas.

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After a lifetime of biting my fingernails, will they ever really return to 'normal'? - Quora

Can't stop biting your nails? Habit replacement therapy might help - CBS Boston

Nail biting - Wikipedia

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6 weeks & going strong: How I quit nail biting - Cadry's Kitchen

Tips to stop nail biting (and how I did it)

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