| The mother was always nervous, and had a bad temper, but the patient was always more or less moody and was an onychophagist. |
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| Being an onychophagist is not only bad for your nails, but is also very bad for your teeth, as biting your nails frequently can push your teeth out of alignment. |
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| The mother is an irritable, domineering onychophagist who has always rejected the patient, despite her role as an older sister, and a schoolteacher. |
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| The onychophagist habit of biting nails is psychodynamic, and suggests an interpretative hypothesis of onychophagia itself and the frequent sensation of trouble and refusal. |
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| Onychophagist behaviour is a widespread but largely unstudied phenomenon, in which one of the interpretations characterises onychophagia as a non-pathological behavioural symptom. |
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