I am one frustrated mother. You know why? It has been a month already and I noticed my kid is starting to bite his nails. I blame the husband for this as he has the habit to bite his nails too. I'm getting tired of telling the little boy to stop biting his nails. Help!
From BabyCenter
Why it happens
If your toddler is biting his nails, you may worry that he's anxious about something. After all, many people describe nail biting as a "nervous habit." But anxiety is only one explanation for why children nip at their nails. Your toddler may be doing it for a number of other less worrisome reasons — out of curiosity or boredom, to relieve stress, to pass the time, or simply from force of habit. Of all the nervous habits — which include thumb sucking, hair twisting, and nose picking — nail biting is the most common (almost all kids do it at some point) and the most likely to continue into adulthood. About a third of elementary school students and half of adolescents bite their nails, at least for a little while. Still, chances are your child will stop the habit on his own, either because he loses interest or because his friends and classmates tease him about it.
What to do
Keep his hands occupied. If you can pinpoint the times and places when your child's particularly likely to bite his nails — while watching TV, for example, or riding in the car — try giving him substitutes such as finger puppets, a squeezable ball, or a bendable toy to keep his hands busy. Cut his fingernails short so there's nothing to tempt him to bite.
Wait and hope. Beyond giving him toys to play with, your best bet is to ignore the behavior altogether. Your toddler's nail biting is an unconscious habit, which means he doesn't realize he's doing it — until you call attention to it, of course — so nagging and punishing won't help. And explaining to him how gross you think it is will probably just enthrall him and goad him into doing it even more. And if your child is in the throes of toddler contrariness — when everything you ask for elicits a hearty "no" in response — he might respond to pressure to stop by embracing the habit with full zeal. You'll see bitter-tasting solutions at the drugstore, but at this age, painting these concoctions on his nails will seem like unjust punishment. (They will be more helpful as reminders in the elementary years when he'll probably want to stop.)
Check it out. In some cases, nail biting — especially if grouped with other nervous behaviors — can signal tension. For example, if your child bites his nails so intensely that he tears his nail beds or bloodies his fingertips, or chews on his nails and engages in other self-destructive behaviors such as pulling his hair out, talk to his pediatrician. He may be suffering more anxiety or stress than is usual for kids his age. Most children, however, choose one or a few habits to indulge in (thumb sucking and nose play is a common combination), then give them up without any encouragement. Do your best to ignore the habit and all of a sudden one day you'll realize it's gone the way of diapers and teething rings.