While Not Recommended, Nail Biting And Thumb Sucking Reduce Risk Of Developing Allergies, Study Finds.

CBS News (7/11) reports on its website and during a broadcast that “children who bite their nails and suck their thumbs are about one-third less likely to develop certain allergies,” according to a new study published in the journal Pediatrics. “Cat, grass, house dust mite, and dog [allergies] – those were reduced, some significantly, some borderline,” said study author Malcolm Sears, a researcher for the Firestone Institute for Respiratory Health at McMaster University School of Medicine, in Ontario, Canada. “When they suck their thumbs or bite their nails they’re exposing themselves to additional microbes or dirt which is stimulating the immune system.” CBS News adds that the findings do not imply parents should encourage their kids to bite their nails or suck their thumb, noting “the American Dental Association advises that while thumb- or finger-sucking is a natural reflex in young children, intense sucking can cause problems with a child’s tooth alignment.”