Black Teeth: Stains, Causes, Risks, and Treatment

Last Updated: 09/19/2026

Black stains on teeth can have several causes. Some are surface stains that can be removed professionally. Others may represent hardened tartar, tooth decay, an old restoration, or discoloration originating from inside the tooth.

The appearance alone doesn’t always tell us the cause.

A dentist can determine whether a black area is simply staining or whether the tooth needs treatment by examining the tooth and, when indicated, taking dental X-rays.

This distinction matters because whitening a stain and treating tooth decay are completely different treatments. Tooth discoloration can be extrinsic, meaning it affects the outer tooth surface, or intrinsic, meaning the discoloration originates within the tooth.

Black Stains on Teeth: Quick Answer

Black or dark areas on teeth may result from:

• Surface staining.
• Hardened plaque or tartar.
• Coffee, tea, or other highly pigmented drinks.
• Tobacco exposure.
• Tooth decay.
• Old dental restorations.
• Trauma to a tooth.
• Changes within the dental pulp.
• Certain medications or oral rinses.

A new black spot on one tooth should not automatically be assumed to be a stain. Black spots can sometimes indicate significant tooth decay, particularly when accompanied by a hole, sensitivity, pain, or other symptoms.

Noticing black stains or dark spots on your teeth? At Dent Blanche Dental, we know how unsettling this can be—not only for your appearance but also for your health.
As a luxury dental office in Princeton, NJ, we specialize in diagnosing and treating the root causes of tooth discoloration using the latest cosmetic and restorative techniques. In this guide, you’ll learn about the most common causes of black teeth, their associated risks, and how our expert team can help you restore a healthy, radiant smile.

Black stains on teeth can make even healthy smiles look dull and aged. At Dent Blanche Dental, Dr. Radwa Saad helps patients safely remove dark tooth stains using advanced cosmetic and preventive dentistry.

Black teeth: stains, causes, risks and treatment

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Black Stains on Teeth at a Glance

This table is a guide, not a diagnosis. Similar-looking black areas can have very different causes.

What Causes Black Stains on Teeth?

#Black Stains on teeth

There isn’t one single cause of black stains on teeth.

The first step is determining whether the discoloration is extrinsic or intrinsic.

Extrinsic Black Stains on Teeth

Extrinsic stains develop on the outside surface of enamel.

Common contributors include:

• Coffee.
• Tea.
• Red wine.
• Dark-colored foods.
• Tobacco.
• Plaque accumulation.
• Tartar.
• Certain environmental exposures.

Intrinsic Black or Dark Tooth Discoloration

Intrinsic discoloration originates within the tooth.

Potential causes include:

• Dental trauma.
• Changes involving the dental pulp.
• Early stage tooth decay.
• Certain medications.
• Some developmental conditions.
• Dental materials.
• Aging.

Are Black Stains on Teeth Cavities?

Sometimes—but not always.

This is one of the most important distinctions in this article.

A black spot can represent:

• Surface stain.
• Stained pits or grooves.
• Tartar.
• Tooth decay.
• Discoloration around an existing restoration.

Black Stains on Teeth vs. Cavities

Don’t use this comparison to self-diagnose. A dentist may need an examination and X-rays to determine the cause.

Can Tartar Cause Black Stains on Teeth?

Yes. Tartar can become dark.

Dental plaque is a sticky bacterial biofilm. If it isn’t removed, it can harden into tartar, also called dental calculus.

Tartar can also absorb pigments over time. Coffee, tea, red wine, smoking, and tobacco can make calculus appear progressively darker.

Black Tartar Near the Gumline

Dark buildup near the gums should be professionally evaluated.

Do not try to scrape tartar from your teeth with:

• Metal instruments.
• Sharp objects.
• Dental scalers purchased online.
• Pins or needles.

You can damage your enamel or gums.

Instead, schedule a professional dental cleaning.

Can Smoking Cause Black Stains on Teeth?

Yes.

Tobacco use is strongly associated with extrinsic tooth discoloration.

Smoking can also contribute to oral health problems beyond staining.

If dark discoloration is accompanied by:

• Bleeding gums.
• Gum recession.
• Persistent bad breath.
• Loose teeth.
• Oral lesions.

Why Do I Have Black Stains Between My Teeth?

Black lines or black areas between teeth can have several explanations.

Possible causes include:

• Surface staining.
• Plaque or tartar.
• Interproximal tooth decay.
• Existing restorations.
• Changes in the shape of the gums or spaces between teeth.

Dental X-rays can help your dentist evaluate areas that are difficult to see directly.

If you repeatedly notice dark areas or food trapping between the same teeth, mention it during your next dental check-up.

Black Stains on Teeth: Dr. Radwa Saad’s Clinical Insight

One of the most common questions patients ask when they notice a dark area is:

“Is this a stain, or is it a cavity?”

The answer cannot always be determined by color alone.

I look at the location, surface texture, integrity of the enamel, existing restorations, symptoms, dental history, and X-rays when indicated.

This is particularly important when only one tooth suddenly becomes darker or when a black spot appears within a pit, groove, or around an existing filling.

If it is simply an extrinsic stain, treatment can be straightforward.

If it is decay, treating it earlier may allow us to preserve more healthy tooth structure.

The diagnosis should come before whitening or cosmetic treatment.

How Do Dentists Diagnose Black Stains on Teeth?

Your dentist may use several methods.

Visual Examination

We evaluate:

• Color.
• Location.
• Surface texture.
• Existing fillings or crowns.
• Plaque and tartar.
• Signs of decay.

Dental X-Rays

X-rays can help detect decay that isn’t obvious visually, especially between teeth or underneath existing restorations.

Periodontal Examination

If dark buildup is concentrated near or below the gumline, your dentist may also evaluate your periodontal health.

Pulp Testing

A significantly darkened single tooth may require evaluation of the dental pulp, particularly when there is a history of trauma.

How to Remove Black Stains on Teeth

Treatment depends entirely on the cause.

There is no single treatment for every black spot.

Professional Dental Cleaning

If the discoloration comes from plaque, tartar, or removable surface stain, professional cleaning may significantly improve the appearance.

Teeth Whitening

Professional whitening can help certain types of tooth discoloration.

Whitening treatments commonly use hydrogen peroxide or carbamide peroxide to alter tooth color. However, whitening is generally most predictable for appropriate types of staining and does not fix cavities or remove hardened tartar.

Learn more about professional teeth whitening.

Dental Filling

If the black area is caused by tooth decay and the tooth can be restored conservatively, your dentist may remove the decay and place a filling.

Dental Bonding

Bonding may camouflage certain discolorations when whitening isn’t appropriate or sufficient.

Porcelain Veneers

For selected cosmetic cases involving persistent discoloration, porcelain veneers may be considered.

Dental Crown

A significantly damaged or weakened tooth may require a crown rather than whitening or bonding.

Root Canal Treatment

If discoloration is associated with irreversible pulpal damage or infection, treating the internal tooth problem takes priority over cosmetic correction.

How to Prevent Black Stains on Teeth

You cannot prevent every type of discoloration, but you can reduce many surface stains.

Brush Twice a Day

Use fluoride toothpaste and a soft-bristled toothbrush.

Clean Between Your Teeth Daily

Depending on your needs, use:

• Dental floss.
• Interdental brushes.
• Floss picks.
• Water flossers.
• Another dentist-recommended cleaner.

Read our guide to the 11 types of dental floss and dental picks vs. floss.

Rinse With Water After Staining Drinks

Water can help rinse pigments from the mouth after coffee, tea, or other staining beverages.

Avoid Tobacco

This can reduce staining while also benefiting your overall oral health.

Schedule Regular Dental Cleanings

Professional cleaning removes deposits that cannot be removed with ordinary brushing and flossing.

When Should You See a Dentist for Black Stains on Teeth?

Schedule an examination if:

• A black spot appears suddenly.
• One tooth becomes significantly darker.
• The area is getting larger.
• You see a hole in the tooth.
• The tooth hurts.
• You develop sensitivity.
• The tooth hurts when biting.
• A filling becomes dark or damaged.
• The gums bleed around the area.
• Dark buildup won’t brush away.
• You have a history of trauma to the tooth.

Tooth discoloration accompanied by pain, bad breath, bleeding gums, or visible holes warrants dental evaluation.

Black Stains on Teeth: Frequently Asked Questions

Why do I have black stains on my teeth?

• Surface staining can cause them.
• Dark tartar is another possibility.
• Tooth decay can also appear dark.
• A dental examination can determine the cause.

Are black stains on teeth always cavities?

• No.
• Some are surface stains.
• Some are tartar.
• Others may represent tooth decay.

Is a black dot on a tooth a cavity?

• It can be.
• Stained pits and grooves can also look dark.
• Color alone cannot confirm decay.
• Have persistent black spots examined.

Can black stains on teeth be removed?

• Surface stains often can.
• Tartar requires professional removal.
• Cavities require restorative treatment.
• Intrinsic discoloration may require other treatment.

Can brushing remove black stains?

• Some superficial staining may improve.
• Hardened tartar will not brush away.
• Tooth decay will not disappear with brushing.

Does black tartar come off with brushing?

• No.
• Tartar is mineralized plaque.
• Professional dental instruments are needed to remove it.

Why are my teeth black near the gums?

• Dark tartar may be present.
• Surface staining can contribute.
• Decay or other dental conditions are also possible.
• Schedule an examination if it persists.

Why is there a black line around my filling?

• It may be staining.
• The restoration may have changed.
• Recurrent decay is another possibility.
• Your dentist should evaluate persistent changes.

Why is one tooth turning black?

• Trauma is one possibility.
• Pulpal changes may cause darkening.
• Decay can also contribute.
• A single darkening tooth should be evaluated.

Can coffee cause black stains on teeth?

• Coffee contributes to extrinsic staining.
• Tea and red wine can also stain enamel.
• Professional cleaning may remove some surface stains.

Can smoking cause black stains?

• Yes.
• Tobacco contributes to extrinsic tooth discoloration.
• It can also worsen other oral health problems.

Will teeth whitening remove black stains?

• It depends on the cause.
• Whitening can improve some discoloration.
• It cannot remove cavities or tartar.
• Diagnose unexplained dark spots first.

Are black stains on children’s teeth normal?

• They can have several causes.
• Some are stains.
• Others may be decay or developmental changes.
• Persistent dark spots should be examined.

When should I worry about a black tooth?

• Sudden color change.
• Pain.
• Swelling.
• Significant sensitivity.
• History of trauma.
• A visible hole or broken tooth.

Black Stains on Teeth: The Bottom Line

Black stains on teeth are not automatically cavities, but they shouldn’t automatically be dismissed as harmless staining either.

Dark discoloration can result from surface pigments, plaque, tartar, tobacco, tooth decay, restorations, trauma, or changes occurring inside the tooth.

The correct treatment depends on the cause.

Professional cleaning may be enough for some surface stains. Whitening may improve appropriate discoloration. Cavities require restorative treatment, while a tooth with pulpal damage may need a completely different approach.

Concerned About Black Stains on Teeth?

If you’ve noticed black stains on teeth, a new dark spot, discoloration around a filling, or one tooth becoming darker than the others, schedule an evaluation at Dent Blanche Dental.

Dr. Radwa Saad and our dental team can determine whether the discoloration is caused by surface staining, tartar, decay, an existing restoration, or an internal change within the tooth and recommend treatment based on the diagnosis.

Explore our dental check-ups, dental cleanings, and teeth whitening services.

Dent Blanche Dental — Princeton, NJ 08540

Dent Blanche Dental

Call: 609-890-1888

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