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Smiling in the mirror may be alarming if black patches on gums seem to appear out of nowhere. The good news is that most causes of black stains on gums are harmless.

Here’s how to tell when black gums are normal, when to call your dentist, and how to get rid of black gums.

What Causes Black Gums?

Your gums get their color from melanin, the natural pigment that gives color to your skin, hair, and eyes. Like skin and hair tones, gum color varies widely from person to person and across different populations.

But gums can also darken for other reasons, including tartar buildup, staining, inflammation, or certain medical conditions.

What Does It Mean When Gums Are Black?

Several conditions can lead to black gums. Some causes are natural, while others require treatment.

Gingival pigmentation

Some people naturally have darker gums because their gum tissue contains more melanin. This darker coloring, called gingival pigmentation, is the most common reason gums look brown or black. It’s usually harmless.

If your gum color has been the same since childhood or adolescence, has an even, dark color, and doesn’t include pain or swelling, gingival pigmentation is the likely cause.

Smoker’s melanosis

Smoking can stimulate melanin production in your gums. This leads to brown or black patches, called smoker’s melanosis, especially on the front gums.

This discoloration often fades if you quit smoking.

Tartar build-up

If you see black tartar on the gum line, you’re likely looking at hardened plaque that has absorbed minerals or pigments. Tartar can turn dark from:

• Certain foods and drinks.
• Iron in saliva.
• Long-term plaque buildup.

Tartar can cause black gums around teeth because it irritates the tissue and traps bacteria. Only a dental cleaning can remove it.

Staining from foods, drinks, or medications

Dark-colored foods and drinks, like coffee, tea, wine, or berries, can stain your gums, especially if you have plaque. Some medications can also cause changes in your gum color.

Amalgam tattoos

If you’ve had silver fillings, tiny particles can embed in the gum and create small, flat, blue-black spots called amalgam tattoos. These are harmless and don’t spread.

Medical conditions

Some medical conditions can cause gum discoloration. These include:

• Addison’s disease — Rare condition where the adrenal glands don’t make enough hormones, leading to fatigue, weight loss, low blood pressure, skin darkening, stomach upset, and salt cravings.
• Certain cancerous or non-cancerous growths — May appear as abnormal spots or bumps on the gums.
• Peutz-Jeghers syndrome — Rare inherited condition causing polyps in the digestive tract and dark, freckle‑like spots on the lips, mouth, hands, feet, and sometimes the genitals.

How to Get Rid of Black Gums

You may see a darker color on the front gums, inner cheeks, or near dental restorations. Dentists often evaluate the pattern of the dark spots — widespread, patchy, or limited to one spot. This helps distinguish normal melanin activity from spots that need closer monitoring.

Black gum treatment depends on the cause:

• Gum depigmentation — For people who want to lighten naturally dark gums, dentists can use laser therapy or surgical techniques to remove excess pigment. Studies show that laser depigmentation, a treatment that lightens dark or patchy gums by targeting the pigment that causes discoloration, is effective and well-tolerated.
• Monitoring suspicious spots — If an area or spot looks unusual, your dentist may recommend a biopsy to rule out rare conditions.
• Professional cleaning — If tartar or staining is the cause, a cleaning removes buildup and restores your natural gum color.
• Stopping tobacco use — If smoking is causing pigmentation, quitting often leads to gradual fading.
• Treating underlying conditions — If your dentist suspects a medical condition is causing your black gums, they may refer you to a specialist.

What Causes Black Line on Teeth?

Black lines on teeth usually come from:

• Chromogenic bacteria (harmless bacteria that cause stains).
• Old metal dental work.
• Staining from foods or drinks.
• Tartar buildup at the gum line.

How do I get rid of black lines on my teeth?

Your dentist may recommend:

• Polishing to remove surface stains.
• Replacing old metal restorations if they’re causing discoloration.
• Scaling to remove tartar.
• Whitening treatments.

Daily brushing and flossing can help prevent the lines from returning.

Gum Discoloration Prevention and Care

You can reduce your risk of tooth and gum discoloration with simple daily habits:

• Avoid tobacco — Smoking is a major cause of gum pigmentation and gum disease.
• Brush twice a day — Use a soft-bristled toothbrush and fluoride toothpaste. Focus on the gum line, where plaque tends to collect.
• Floss daily — Flossing removes plaque between teeth, where black staining often starts.
• Rinse with water after dark foods — Coffee, tea, wine, and berries can stain gums and teeth. A quick rinse helps.
• Schedule regular cleanings — Professional cleanings remove tartar and catch early signs of gum problems.

When to see a dentist

If anything looks new or unusual, a dentist can help you figure out what’s going on and guide you toward the right treatment. Early evaluation also helps rule out rare but serious causes. Reach out to a dental professional if you notice:

• A black line that doesn’t brush off.
• A spot that looks irregular or changes over time.
• Black gums around your teeth with swelling or bleeding.
• New or rapidly changing dark spots.
• Pain, tenderness, or sores.