An upside to the annoying habit of nail-biting

ALTHOUGH no doubt small comfort to parents, researchers have found an upside to the annoying childhood habits of thumb-sucking and nail-biting.

According to New Zealand doctors, children with these habits in primary school are less likely to have atopic sensitisation by the time they reach the teen years.

Exploring the hygiene hypothesis, the researchers from the Dunedin School of Medicine at the University of Otago drew on data from a population-based birth cohort of more than 1000 children.

Parents were asked about their

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