How to stop biting your nails: The effects of onychophagy on your teeth
Onychophagia, or the habit of nail biting, is a common behaviour seen in many people. It is frequently observed in children and young adults. It’s estimated that around 30% of children, 45% of teenagers, 25% of young adults, and 5% of adults bite their nails.
Though often unconscious and seemingly harmless, this behaviour can have real consequences for both your oral and overall health. Nail biting can lead to unexpected issues not only for your fingers but also for your teeth and temporomandibular joint.
At Lapointe Dental Centres, our dental professionals regularly see the effects of this habit on teeth and gums.
What Is Onychophagia?
A Common Habit Among Children and Young Adults
Nail biting is a compulsive behaviour that affects a significant portion of the population, especially during childhood and adolescence.
While this habit often fades with adulthood, it can persist and lead to dental problems, or even complicate certain orthodontic treatments. Understanding the root cause of this habit is the first step toward putting an end to it.
The Most Common Causes of Onychophagia
This habit can stem from anxiety, stress, loneliness, copying a family member, boredom, inactivity, or poor nail care. Often linked to stress, onychophagia acts as a coping mechanism for managing intense emotions. It’s a behavioural response that can become deeply ingrained, automatically triggered in moments of discomfort or intense focus.
The Effects of Onychophagia on Oral Health
Regularly chewing on your nails can have a direct and harmful impact on your entire mouth. Over time, your teeth, gums, and even jaw can suffer significant damage.
Enamel Wear and Tooth Sensitivity
This bad habit creates microtrauma to the teeth, which can lead to enamel fractures. While these cracks may initially be superficial, repeated damage can become more serious and eventually require the repair of one or several teeth.
Nail biting also contributes to increased tooth sensitivity, as the enamel becomes worn down and thinner, exposing the more sensitive inner layers of the tooth structure.
Risks to the Gums and Soft Tissues
Bacteria found under your nails can transfer to your gums, leading to gingivitis (gum inflammation) or even mouth ulcers (canker sores), which cause discomfort. Frequent contact between unclean nails and the gums can introduce harmful pathogens, increasing the risk of localized infections and chronic inflammation.
Jaw Strain and Temporomandibular Joint (TMJ) Disorders
Nail biting also places stress on the temporomandibular joint, which can result in jaw pain, muscle tension, inflammation, and difficulty chewing or closing the mouth properly. This repetitive pressure can contribute to the development of TMJ disorders and lead to recurring headaches.
Broader Impacts on Overall Health
Nail and Skin Infections
Repeated trauma and injury around the nail area can increase the likelihood of viral or bacterial infections. One common example is paronychia—a painful inflammation around the nail. Nail biting can also lead to the development of herpes or warts on the fingers and lips, as the virus can transfer from mouth to fingers and vice versa.
Transmission of Viruses and Bacteria
Fingernails can harbor a significant number of bacteria and germs. Bringing your fingers to your mouth provides an easy pathway for these microorganisms to enter your body. This habit increases the risk of catching viral or bacterial infections like the common cold, gastroenteritis, and other illnesses. Maintaining good hygiene becomes more challenging when this harmful habit persists.
How to Stop Nail Biting?
Fortunately, there are effective ways to break this harmful habit. Some strategies combine self-awareness with practical solutions.
Recognizing the Habit and Identifying Triggers
The first step is becoming aware of the habit, as most people do it unconsciously. Next, it’s essential to identify what triggers it—whether it’s work-related stress, anxiety before a big event or exam, boredom, or moments of loneliness. Beyond awareness, a strong commitment to overcoming the habit is key to lasting change.
Tips and Products to Break the Habit
There are several products available to help raise awareness of when you’re about to bite your nails—one of the most common being bitter-tasting nail polish. This clear polish leaves a bad taste that acts as an immediate deterrent. However, some people eventually get used to the taste, making it less effective. Another method is to place a piece of tape or a small bandage on your nails as a physical reminder.
A useful tip: start by covering just one nail on each hand. Once that nail has grown back, move the tape or bandage to another finger, and repeat the process. Keeping your nails well-groomed with regular manicures can also discourage the habit. You might also try keeping your hands busy with a manual activity, a stress ball, or even chewing sugar-free gum when the urge strikes.
The Importance of Relaxation and Stress Management
Since onychophagia is often linked to stress, relaxation should not be overlooked. Breathing techniques, meditation, or regular physical activity can help reduce anxiety and lessen the urge to bite your nails. Addressing the emotional root of the habit is key to making lasting changes.
When to Consult a Professional
The Dentist’s Role in Managing Dental Damage
If you notice signs of tooth wear, increased sensitivity, or jaw discomfort, it’s a good idea to schedule a visit to a dental clinic. An oral health professional can assess the extent of the damage to your teeth, check the condition of your enamel and gums, and recommend suitable treatment options to protect or restore your smile.
Don’t wait for pain to set in before making an appointment.
Psychological Support for Persistent Cases
When onychophagia becomes a severe compulsive behavior that doesn’t respond to common strategies, medical or psychological support may be needed. Behavioral therapy can help identify the underlying causes of anxiety and offer more effective ways to manage and overcome the habit.
Conclusion: Protect Your Teeth and Health by Breaking the Nail-Biting Habit
And most importantly, don’t get discouraged if you can’t quit this habit right away—it takes patience and determination, but it is possible. Keep in mind the many benefits you’ll gain and the discomforts associated with onychophagia, from its impact on your nails, fingers, and mouth, to your jaw joint and teeth.
Quitting nail biting is an important step for both your oral health and overall well-being. By protecting your teeth, you’re investing in your long-term smile and health. If you’re concerned about how this habit is affecting your teeth, our team is here to help.
