A: Doctors classify chronic nail biting as a type of obsessive-compulsive disorder since the person has difficulty stopping. People often want to stop and make multiple attempts to quit without success. People with onychophagia cannot stop the behavior on their own, so it's not effective to tell a loved one to stop.
The Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition, categorizes chronic nail biting as other specified obsessive-compulsive disorder (OCD), classified in the same group as compulsive lip biting, nose picking, and hair pulling (American Psychiatric Association, 2013).
What is onychophagia? Onychophagia is the clinical name for fingernail biting. It is a common stress-related or nervous habit in children and adults.
In some cases, nail biting can be caused by an underlying mental health condition. For example, chronic nail biting may be a sign of obsessive-compulsive disorder (OCD). OCD causes you to use repetitive, compulsive behaviors to ease the anxiety caused by obsessive, intrusive thoughts.
Nail-biting is frequently associated with anxiety, because the act of chewing on nails reportedly relieves stress, tension, or boredom. People who habitually bite their nails often report that they do so when they feel nervous, bored, lonely, or even hungry.
Perfectionists are often so focused on results, that they aren't able to relax, and they overwork themselves. "They are therefore prone to frustration, impatience, and dissatisfaction when they do not reach their goals," she explained. And that can lead to nail biting, apparently.
Additionally, if you swallow the nails, they can do damage to the epithelial lining of your esophagus and stomach. They will not digest, so if they're sharp, they will make their way through your entire body potentially scratching up your digestive tract.
There can also be physical manifestations of the anxiety caused by ADHD such as headache, nausea, nail-biting or cuticle-picking.
Scientists, in fact, are still trying to figure out exactly why people bite their nails. But they do know that it's a habit for a lot of us: about 20 to 30 percent of the population are nail biters, including up to 45 percent of teenagers.
In fact, you may have heard how it takes 21 days to break a habit. This figure was popularized by a 1960s book called “The New Psycho Cybernetics” by Maxwell Maltz.
To date, several treatments have been developed in order to treat onychophagia. However nail biting remains an unsolved problem in medicine and dentistry [2].
Sometimes, nail biting can be a sign of emotional or mental stress. It tends to show up in people who are nervous, anxious or feeling down. It's a way to cope with these feelings. You may also find yourself doing it when you're bored, hungry or feeling insecure.
Regularly biting your nails can cause your teeth to shift out of place, which can require correctional braces or a retainer. Nail biting could also cause your teeth to break or could damage your tooth enamel. The germs could also potentially infect, or cause irritation, to your gums.
Therefore, nail biting is a possible indication of the presence of the more severe ADHD-C subtype. Our results imply that a nail biting habit among these ADHD children is more related to insufficient parenting skills, rather than being part of general anxiety symptoms.
Self-stimulatory behavior, often called “stimming,” is when a child or adult repeats specific movements or sounds as a way to self-soothe or remain engaged in a situation, often referred to as “fidget to focus.” Many people assume that only individuals with autism engage in self-stimulatory behaviors.
Some of the reasons children bite their nails includes stress or anxiety, they are bored, they've seen other children do it and copy their behaviors, or their nails are not kept trimmed and they do it as a form of self-trimming. Most children that bite their nails have no problems.
Nail biting can also transfer pinworms or bacteria buried under the surface of the nail to your mouth. When bitten-off nails are swallowed, stomach problems can develop.
"From chronic nail biting, you can damage the nail matrix (the tissue under the actual nail) and can have permanent nail deformities like ridges," explains Dr. Jaliman.
When you bite your nails, those bacteria end up in your mouth and gut, where they can cause gastro-intestinal infections that lead to diarrhea and abdominal pain.
Nail biters are more often male than female after age 10 (10% fewer bite their nails than boys), and individuals with a higher rate of intelligence tend to bite their nails more than those of less intelligence.
Nail biting almost always begins in childhood. It's a behavior often associated with stress or anxiety, but it's likely more complicated than that. For instance, one theory is that it helps some people regulate their emotions — or it feels like it does anyways.
Nail-biting (onychophagia) is a common stress-relieving habit. You may bite your nails in times of stress or excitement, or in times of boredom or inactivity. It can also be a learned behavior from family members.
Several studies indicate that there is a genetic component to nail biting (also known as onychophagia). One study has shown that 36.8% of nail biters had at least one family member with this habit. Studies of twins have shown that identical twins are more likely to both be nail-biters than non-identical twins.
Nail biting, also known as onychophagy or onychophagia (or even erroneously onyhophagia), is an oral compulsive habit of biting one's fingernails.