Dark brown or black gums are normal for most Black people. The color comes from melanin, the same pigment that gives skin its color, and a review in the Journal of Pharmacy and Bioallied Sciences reports oral melanin pigmentation in healthy people of dark-skinned African populations at a prevalence of up to 100% (Sreeja et al., 2015). What matters is not the color itself but a change: a new dark spot, a patch that grows, or darkening that comes with other symptoms. Those are worth showing a dentist.
What normal gum pigment looks like
Healthy pigmented gums are firm, not swollen, and do not bleed easily. The color is usually brown to black and spreads along the attached gum, the tight band of gum around the teeth, often most visible above the front teeth. It may look like a ribbon or patchy stripes, and it usually shows on both sides of the mouth. The tongue, the inside of the cheeks and the lips can carry pigment too.
Doctors call this physiologic or racial pigmentation. It is not a disease and needs no treatment. The same review notes that oral pigmentation in Asian populations ranges from 30% to 98%, so pigmented gums are normal in many groups, not only in people of African descent (Sreeja et al.).
What normal pigment does not do: it does not suddenly appear in adulthood, grow, bleed, form a lump, or show up as a single isolated spot.
Other causes of dark gums
A 2025 review in the American Journal of Clinical Dermatology sorts dark spots in the mouth into a spectrum that runs from normal pigment and amalgam tattoos, through reactive changes such as smoker's melanosis, to benign moles and, rarely, oral melanoma. It stresses that most are benign but that each needs a careful exam and, when indicated, a biopsy (Wolk et al., 2025).
Smoking. Smoker's melanosis is extra pigment triggered by tobacco smoke, on the gums and the inside of the lips. The 2015 review says it may occur in up to one in five smokers, and that gum pigmentation in children has been linked to secondhand smoke from adults at home (Sreeja et al.). Smoking is also the most significant risk factor for gum disease, according to the National Institute of Dental and Craniofacial Research (NIDCR), so quitting helps your gums either way.
Medicines. The review lists drugs that can darken the mouth, including antimalarials such as chloroquine, the antibiotic minocycline, the HIV medicine zidovudine, some chemotherapy drugs, the antifungal ketoconazole, and hormones such as oral contraceptives (Sreeja et al.). If the darkening started after a new prescription, tell the prescriber. Do not stop a medicine on your own.
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See a doctor todayAmalgam tattoo. A small, flat blue-gray spot near a silver filling or a past extraction is usually a bit of filling material trapped in the gum. The review calls it one of the most common causes of a dark spot inside the mouth. It is harmless, but because it is a single spot it can look like a mole, so a dentist may want to confirm it, sometimes with an X-ray or biopsy (Sreeja et al.).
Addison disease. When the adrenal glands stop making enough hormones, the body overproduces a pituitary hormone that also stimulates pigment. The review describes the mouth pigment of Addison disease as blue-black or brown patches on the tongue, gums, inside of the cheeks and palate (Sreeja et al.). It comes with other symptoms. MedlinePlus lists extreme tiredness and weakness, dizziness when standing up, salt craving, weight loss, nausea and darkening of the skin (MedlinePlus, Addison disease). New darkening plus symptoms like these is a reason to see a doctor soon, not just a dentist.
Rare syndromes. Peutz-Jeghers syndrome causes small dark spots on the lips and inside the mouth along with bowel polyps, and Laugier-Hunziker syndrome causes flat dark spots in the mouth and on the lips, often with dark nail bands (Sreeja et al.). Both are uncommon.
Oral melanoma. Melanoma inside the mouth is rare, and the review notes it commonly occurs on the palate, the roof of the mouth (Sreeja et al.). The 2025 review explains that mucosal melanoma differs from skin melanoma down to its genetics, which affects treatment (Wolk et al.). Because normal pigment is so common in Black mouths, a new or changing patch can be overlooked, which is why change matters more than color.
Dark gums versus gum disease
Gum disease is a different problem. The National Institute of Dental and Craniofacial Research lists its signs as gums that are red, swollen or tender, gums that bleed easily, gums pulling away from the teeth, loose or sensitive teeth, pain when chewing and bad breath that does not go away (NIDCR, Gum disease). On dark gums the redness can be hard to see, so go by the other signs. Pigment alone, with firm gums that do not bleed, is not gum disease.
If you are worried about cost, our guide to dental care without insurance covers low-cost options, and community health centers offer dental care on a sliding scale.
Gum lightening: what it is and what to expect
Some people choose to lighten their gums for appearance. Dentists and periodontists do this by removing the thin top layer of pigmented gum tissue with a scalpel, a laser or other methods. A 2019 systematic review and meta-analysis of 25 studies found no significant difference between laser and scalpel in how well the pigment was removed or how often it came back, with less pain after laser treatment. It also found that pigment returned in some patients within six months, more so after laser (Gul et al., 2019).
Things to weigh before choosing it: the procedure treats appearance only, healthy pigmented gums need no treatment, the color can return, and it should be done by a licensed dentist or periodontist after an exam rules out other causes. Avoid any product or salon service that promises to bleach gums. Gum tissue is easy to burn.
When to see a dentist or doctor
Book a dental visit if:
- A new dark spot appears in your mouth as an adult.
- A spot is growing, changing shape, raised, or has uneven color.
- A dark area bleeds, forms a sore that does not heal in two weeks, or feels like a lump.
- There is a dark patch on the roof of your mouth.
- Your gums are swollen, tender or bleed when you brush.
See a doctor soon if darkening of your gums, lips or inner cheeks comes with deep tiredness, dizziness when standing, salt craving or weight loss. Go to an emergency room or call 911 for severe belly pain, vomiting, confusion or fainting.
Take photos of the area in good light so you and your dentist can compare over time. Your regular dental checkup already includes an exam of the whole mouth, which is the best routine screen for changes.
Frequently asked questions
Why are my gums black? ▼
For most Black people, dark gums are normal melanin pigment, present since childhood and even on both sides. Smoking, some medicines, a filling particle under the gum and, rarely, hormone problems or melanoma can also darken gums. A new or changing spot is the one to get checked.
Are dark gums unhealthy? ▼
No. Pigment and gum health are separate. Firm gums that do not bleed are healthy whatever their color. Swelling, tenderness and bleeding are the signs of gum disease.
Can black gums turn pink? ▼
Normal pigment does not fade on its own. Gum lightening procedures done by a dentist or periodontist remove the pigmented layer, but a 2019 review found the color returned in some patients within months. If darkening started with smoking or a new medicine, talk with your dentist or prescriber about that cause first.
Can a dark spot on the gum be cancer? ▼
Rarely. Oral melanoma is uncommon, but because it can look like normal pigment at first, any single new, growing or changing spot, and especially a dark patch on the roof of the mouth, should be examined by a dentist.
