Nail-biting, known medically as onychophagia, has long been considered a common habit, especially among children and teenagers. Yet doctors caution that the behaviour can be far more damaging than it ...

“It seems like not many people knew that nail biting could cause such a big issue, including myself,” Gabby Swierzewski tells PEOPLE Gabby Swierzewski Gabby Swierzewski has been a nail-biter for as ...