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Nail Biting--Why We Do it and Why We Should Probably Stop

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Skin, Hair & Nails related image Photo: Getty Images

Many people engage in behaviors that range from nail biting, thumb sucking and foot tapping to more physically harmful behaviors like teeth grinding, hair pulling or head banging.

Habit disorders consist of stereotypical repetitive, seemingly driven and non-functional motor habits that often interfere with normal activities and may lead to injury to a body part. The majority of these behaviors are considered harmless and considered part of normal growth and development, but in some cases, the habit persists into adulthood and can be very distressing.

Habits like nail biting are very common and often go unnoticed. However, often the repetitive nail biting can lead to severe injury to the fingers, leading to a variety of infections and deformities. Nail biting is commonly first seen in preschool age up to adolescence and happens in as many as 50-60 percent of individuals. With time, most children grow up out of this habit. However, at least 3-8 percent of the adult population continue to bite their nails. The majority of these people who bite their nails have some degree of anxiety, obsessive compulsive personality or impulse control problem.

Nail biting is slightly more common in females at all ages. While nail biting may be benign, it can lead to extremely short fingernails, infections of the nail, oral herpetic infection, herpetic whitlow, damaged dentition, fracture of teeth and even gum infections. Moreover, the nail and finger often look aesthetically unpleasing.

Like most things in psychiatry, no one really knows why people bite their nails repetitively. Three common reasons include genetics, a poor environment and a difficult childhood.

For most people who bite their nails, treatment is only required if the nail biting is persistent and causes distress to the person. Additionally, if the habit is so severe that it has caused damage to the nails and recurrent infections, then it is wise to seek therapy.

The treatment of nail biting includes some type of behavior therapy that helps reverse the habit.

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EmpowHER Guest

The reason it is hard to stop thumb sucking with all the negative tools like bitter polish is because thumb sucking is such a comforting thing to a child and they will not want to give it up when you put bitter polish (which has chemicals in it) or shameful thumb guards on. Try the positive approach…there is a fun thing for children called “Thumbuddy To Love” and it comes with a thumb puppet/story book with special tips on how to use it. Teaches kids in a fun and positive way to let go of something so comforting. Worked for my kids. Here is the info: You can get it at thumbuddytolove dot com.
The sooner the better because prolonged thumb sucking can lead to buck teeth and misalignment of the jaw.

Stop Thumb Sucking

February 10, 2011 - 5:09pm
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We value and respect our HERWriters' experiences, but everyone is different. Many of our writers are speaking from personal experience, and what's worked for them may not work for you. Their articles are not a substitute for medical advice, although we hope you can gain knowledge from their insight.