Dark or black gums are usually caused by melanin, the same pigment that determines skin color, and are completely harmless in most cases. But if you want to change the color for cosmetic reasons, or if the darkening appeared suddenly, several effective treatments exist ranging from laser procedures to simple lifestyle changes. The right fix depends entirely on what’s causing the discoloration.
Why Gums Turn Dark
The most common reason for dark gums is genetics. People with darker skin tones naturally produce more melanin in their gum tissue. This is called physiologic pigmentation, and it’s driven by increased activity of melanin-producing cells rather than having more of those cells. It’s not a disease or a sign of poor oral health.
Smoking is another major cause. Chemicals in tobacco stimulate the gum’s pigment-producing cells as a protective response, and the darkening gets worse the more you smoke. This condition, called smoker’s melanosis, is dose-dependent: heavier smokers develop darker, more widespread discoloration.
Certain medications can also darken your gums. Antibiotics like minocycline can cause a bluish-gray discoloration within about a month of use. Antimalarial drugs, chemotherapy agents, some antifungals like ketoconazole, blood pressure medications like amlodipine, and the antiviral drug zidovudine have all been linked to gum darkening. The discoloration happens because these drugs either stimulate melanin production directly or deposit pigmented byproducts in the tissue.
Less commonly, dark gums come from dental materials. Old amalgam (silver) fillings can leave permanent gray or black tattoo-like marks on nearby gum tissue where tiny metal particles become embedded.
When Dark Gums Signal a Health Problem
In rare cases, sudden or worsening gum darkening points to something systemic. Addison’s disease, a condition where the adrenal glands stop producing enough hormones, causes brown patches on the gums, lips, tongue, and inner cheeks. This pigmentation is often the very first symptom, appearing months or even years before other signs like fatigue, weight loss, and low blood pressure. It shows up once roughly 90% of the adrenal gland has been destroyed.
Similar darkening patterns can occur with Cushing’s syndrome, tumors that produce excess stress hormones, vitamin B12 deficiency, and an overactive thyroid. If your gums have darkened recently without an obvious explanation like smoking or a new medication, it’s worth getting bloodwork to rule out these conditions. The key red flag is new pigmentation that wasn’t there before, especially if it’s spreading or accompanied by fatigue, dizziness, or unexplained weight changes.
Laser Gum Depigmentation
Laser treatment is the most popular cosmetic fix for dark gums. A dental professional uses a focused beam of light to remove the thin layer of pigmented tissue, exposing the lighter, pink tissue underneath. The procedure typically takes under an hour and is done under local anesthesia.
Several laser types are used, but diode lasers consistently outperform others. In a systematic review comparing different approaches, six out of eight studies found diode lasers delivered better outcomes than erbium lasers. Diode lasers absorb melanin more efficiently, which means faster treatment and shorter sessions. They also provide the longest-lasting results, with lower recurrence rates at both one-year and two-year follow-ups. Nonsmokers treated with diode lasers had the longest stretch before any pigment returned.
That said, some repigmentation is normal over time. Studies tracking patients for 18 months found no significant recurrence, though slight color return sometimes appeared around the 12-month mark. For most people, results last years before a touch-up becomes necessary.
Cost typically ranges from $500 to $2,000, depending on how much gum area needs treatment and where you live. Most dental insurance plans consider this a cosmetic procedure and don’t cover it.
Scalpel Surgery and Cryosurgery
Before lasers became widely available, scalpel surgery was the standard approach. A periodontist scrapes away the pigmented surface layer of gum tissue using a surgical blade, from the gum margin down to where the gum meets the inner cheek lining. The area is then covered with a protective dressing for about a week while new, lighter tissue grows in.
Cryosurgery uses liquid nitrogen (cooled to roughly negative 186°C) applied to the gums with a cotton swab in brief intervals. The extreme cold destroys the pigmented cells, and the tissue regenerates with less melanin. This approach requires only topical numbing rather than injections, which some patients prefer.
Both techniques work well. In a head-to-head comparison, scalpel surgery achieved a depigmentation score of about 95%, while cryosurgery scored about 96%. The difference wasn’t statistically meaningful. Neither method caused gum recession, and patient satisfaction was comparable between the two. The choice often comes down to what your periodontist is most experienced with and your comfort level with each approach.
Quitting Smoking Reverses Discoloration
If smoking is the cause, the simplest fix requires no procedure at all. Smoker’s melanosis is reversible. Clinical evidence shows that gum pigmentation fades and can disappear entirely after quitting or significantly reducing cigarette use. The timeline varies from person to person, but the gums gradually lighten as melanin production returns to baseline without ongoing tobacco exposure. This is also the only approach that addresses the root cause rather than treating the surface.
Medication-Related Darkening
When a drug is responsible, the discoloration may fade after stopping or switching the medication, though this isn’t guaranteed. The challenge is that medication-induced gum darkening looks identical to other types of pigmentation, so identifying the culprit requires working through your medication list and timeline carefully. If stopping the drug isn’t an option (as with chemotherapy or essential HIV medication), cosmetic treatments like laser depigmentation can still be used once treatment is complete.
What Recovery Looks Like
Recovery from laser depigmentation is straightforward. Mild soreness and swelling typically subside within a few days, and most people return to normal activities within 24 hours. For the first few days, stick to soft foods like yogurt, mashed potatoes, and smoothies. Avoid anything crunchy, hard, or spicy.
Use a soft-bristled toothbrush and keep it away from the treated area initially. Rinsing gently with warm salt water a few times a day helps with healing and reduces inflammation. Let the water drain from your mouth rather than spitting forcefully. Avoid vigorous flossing around the treated area until your dentist gives the go-ahead. If you smoke, you’ll need to stop for at least two weeks after the procedure to allow proper healing and protect your results.
Scalpel surgery recovery follows a similar timeline, though the periodontal dressing covering the surgical site stays in place for about a week. Cryosurgery may cause some initial tissue swelling and peeling as the frozen tissue sloughs off and regenerates.
Choosing the Right Approach
Your best option depends on the cause. If your gums have always been dark and it’s purely genetic, laser depigmentation offers the most predictable, longest-lasting cosmetic improvement. If you smoke, quitting will do more than any procedure and save you money in the process. If a medication is the trigger, addressing that first avoids paying for a cosmetic fix that might not hold.
For anyone considering a cosmetic procedure, a periodontist (a dentist specializing in gum tissue) is the right specialist to consult. They can confirm whether the pigmentation is benign, rule out systemic causes, and recommend the technique best suited to your situation. If the darkening is new, spreading, or uneven in color, getting evaluated before pursuing any cosmetic treatment is especially important to rule out rare but serious conditions like oral melanoma.