Our expert says:
Yes this can be helped. Like d, some people can stop simply by making an appropriate executive decision and sticking to it. And as J says, a clear and bitter nail polish, making it highly unpleasant to nibble the nails, can help a lot. A psychologist can help with motivation and behaviour therapy. Also, try to find alternative things to do with your hand and mouth at the times when you're most likely to get biting --- at home watching telly --- wear a paid of mittens ! get worry beads or something else to do with your hands ; and nibble low-cal snacks like carrot sticks, when your moth feels tempted to nibble.
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