Reviewed by Dr. Brett Broda
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Reading time: three minutes
Repeated nail biting can wear down enamel, chip the edges of your teeth and place extra strain on your jaw. The damage may develop gradually, so you may not notice changes right away.
Table of Contents
How Nail Biting Affects Your Teeth
Fingernails are harder than they may seem. Biting them places repeated pressure on the edges of the front teeth, which are not designed for that kind of stress.
Over time, nail biting may contribute to:
- Small chips or cracks in the teeth
- Worn or uneven biting edges
- Tooth sensitivity caused by enamel loss
- Damage to fillings, bonding, veneers or crowns
- Irritated gum tissue
- Jaw soreness or stiffness
- Worsening esthetics
The risk may be greater if you bite your nails forcefully, have weakened enamel or also clench or grind your teeth. Nail biting often requires moving the lower jaw forward or to one side, which may also strain the jaw muscles and joints.
How to Stop Biting Your Nails
Nail biting often happens unconsciously during stress, boredom or concentration. Identifying your triggers can help you replace the habit with something less damaging.
Strategies that may help you stop biting include:
- Keep your nails trimmed short
- Apply a bitter-tasting polish made to discourage biting
- Cover your nails temporarily with tape or bandages
- Hold a stress ball or fidget item when the urge appears
- Set small goals, such as avoiding one nail at a time
If nail biting feels uncontrollable or causes significant distress, consider speaking with a healthcare or mental health professional. Persistent nail biting can be a body-focused repetitive behaviour, and additional support may help.
Repairing Teeth Damaged by Nail Biting
Treatment depends on how nail biting has affected your teeth. Dr. Broda takes a conservative, individualized approach, evaluating the affected teeth, your bite and any contributing habits before recommending treatment.
Treatment depends on the type and extent of the damage and may include:
- Smoothing and polishing for a slightly rough or uneven edge
- Dental bonding to rebuild a small chip with tooth-coloured composite material
- A dental crown to protect a tooth weakened by a larger crack or fracture
- Repair or replacement of a restoration damaged by repeated biting
- A custom nightguard if clenching or grinding is causing additional wear
- Veneers to improve esthetics of damaged teeth
A nightguard can protect your teeth while you sleep, but it will not prevent daytime nail biting. Addressing the habit remains an important part of preventing further damage.
FAQ
Can a dentist tell if you bite your nails?
A dentist may notice chips, enamel wear or uneven edges consistent with nail biting. Because other habits can cause similar damage, your dentist may also ask whether you grind your teeth, chew ice, use your teeth to open packages, or other similar non-chewing activities.
Can biting your nails move your teeth?
Frequent nail biting places pressure on the front teeth and may contribute to changes in tooth position or bite over time. The risk depends on how often and forcefully you bite your nails. In general, it would be uncommon to actually move your teeth from biting your nails.
Can nail biting make your teeth sensitive?
Yes. Repeated nail biting can gradually wear down enamel or cause small chips that expose more sensitive areas of the tooth. You may notice sensitivity to cold, heat or pressure, especially if the damage becomes more significant.
Are You Concerned About Damage to Your Teeth?
If you notice a chipped or uneven tooth, increased sensitivity, jaw soreness or other changes that may be related to nail biting, a dental exam can help determine whether treatment is needed.
At Broda Family Dental, we can evaluate your teeth and recommend a conservative approach to repair existing damage and help prevent further wear.
We are always accepting new patients! To book an appointment at our dental office in Boulder, CO, call (303) 442-6141 or visit us at 777 29th St, Unit 300, Boulder, CO 80303.
