Dark lips are normal for most people with dark skin. Lips carry melanin just as skin does, and a review of lip hyperpigmentation calls it a common condition with causes that run from normal, physiologic pigment to smoking, medicines, irritation, hormone problems and, rarely, tumors (Vachiramon and McMichael, 2012). What matters is change: lips that darken in adulthood, uneven patches, a single new spot, or darkening along with other symptoms. Smoking is the most common avoidable cause, and quitting is the most effective step. Lightening products sold online can contain mercury, which the FDA warns against (FDA).
What normal lip color looks like on dark skin
Normal lip pigment is usually even and present since childhood. The same melanin shows up inside the mouth: a review of oral pigmentation reports melanin pigmentation of the gums in up to 100% of healthy people in dark-skinned African populations (Sreeja et al., 2015). If your gums are dark too, see our guide to dark gums in Black people.
The lip review notes that color alone can mislead, because how pigment looks depends on how much there is and how deep it sits (Vachiramon and McMichael). That is why the history, how long and how fast, matters more than the shade.
Causes of dark lips
Smoking. Tobacco smoke triggers extra pigment in the lips and gums, called smoker's melanosis. In a study of 213 men in Japan, 73% of those with lip pigmentation were current smokers, against 33% of those without it, which works out to 5.6 times the odds; the more and longer they smoked, the darker the pigment (Haresaku et al., 2007). The oral pigmentation review says smoker's melanosis may occur in up to one in five smokers (Sreeja et al.). It is a visible reason to quit.
Medicines. Drugs that can darken the mouth include 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.). Minocycline has been reported to darken the lips alone (Chu et al., 1994). If your lips darkened after a new prescription, tell the prescriber. Do not stop a medicine on your own.
Common skin conditions are treated in primary care, and community health centers charge on a sliding scale that is often $0. Our directory of free and charitable clinics lists centers by state. A same-day telehealth visit is self-pay and cannot be billed to Medicaid or commercial insurance, so the clinic route usually costs less. If you need a prescription sooner than the next appointment:
Sesame Care
Prescription skincare from a licensed clinician.
From $59 a month, priced up front
Start a skincare consultIrritation and inflammation. The lip review lists inflammatory diseases among causes of lip darkening (Vachiramon and McMichael). On dark skin, inflammation from cracked lips, a reaction to a lipstick or lip balm ingredient, or a cold sore can heal with a darker patch, the same post-inflammatory hyperpigmentation that a review of skin of color describes as more frequent and more severe in darker skin (Davis and Callender, 2010). For a reaction to a lip product, see our guide to contact dermatitis on Black skin; for blisters, cold sores on Black skin.
Addison disease. When the adrenal glands stop making enough hormones, the skin and the inside of the mouth can darken (Sreeja et al.). MedlinePlus lists extreme tiredness and weakness, dizziness when standing up, salt craving, weight loss, nausea and darkening of the skin among its symptoms (MedlinePlus). Darkening plus symptoms like these is a reason to see a doctor soon.
Inherited 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 on the lips and in the mouth, often with dark nail bands (Sreeja et al.). Both are uncommon. Freckle-like spots on the lips that appear in childhood, especially with a family history of bowel polyps, are worth mentioning to a doctor.
Tumors. Benign and malignant growths are on the review's list (Vachiramon and McMichael). They are rare, but a single spot that is new, growing, raised, bleeding or uneven in color needs an exam. Our guide to skin cancer signs on dark skin covers spots in the mouth and other places people rarely check.
Lightening dark lips: what is safe
Normal lip pigment is not a health problem and needs no treatment. If you want lighter lips for appearance, start with the causes you can change: stop smoking, stop any lip product that stings or itches, and protect your lips from sun. The American Academy of Dermatology recommends a lip balm with SPF 30 or higher (AAD).
Be very careful with lightening products. The FDA warns against skin creams, soaps and lotions that contain mercury, usually sold as skin lighteners and anti-aging products, often manufactured abroad and sold illegally in the United States, promoted online and often in shops catering to Latino, Asian, African or Middle Eastern communities. Its advice: check the label for "mercurous chloride," "calomel," "mercuric," "mercurio" or "mercury" and stop using the product right away, and do not use a product with no label or with no English labeling (FDA). Mercury can also harm the people you live with, including babies through breast milk (FDA). Our guide to mercury in skin lightening creams covers the risks in detail.
We found no strong evidence for any over-the-counter lip lightener. For darkening caused by a medicine or a condition, treating that cause comes first; for persistent cosmetic darkening, a dermatologist can tell you which options are reasonable for your lips and your skin tone.
When to see a doctor or dentist
Book a dermatologist or dentist if your lips darkened as an adult without an obvious cause, if you have a single new or changing spot, or if darkening started after a new medicine. See a doctor soon if the darkening comes with tiredness, dizziness on standing, salt craving or weight loss (MedlinePlus). You can find a dermatologist in our directory.
Frequently asked questions
Why are my lips dark? ▼
For most people with dark skin, it is normal melanin. Smoking, some medicines, irritation from lip products and, rarely, hormone or inherited conditions can also darken lips. Change over time is what to watch, not the color itself.
Does smoking make your lips darker? ▼
Yes. Smoking triggers extra pigment in the lips and gums, called smoker's melanosis, and the darkening tracks with how much and how long someone smokes. Quitting is the most effective step.
Can I lighten my dark lips? ▼
Stop smoking, protect lips with an SPF 30 balm and stop any irritating lip product. There is no strong evidence for over-the-counter lip lighteners, and the FDA warns that some imported lighteners contain mercury.
When is a dark spot on the lip serious? ▼
A single spot that is new, growing, raised, bleeding or uneven in color should be examined. Darkening with tiredness, dizziness or weight loss can be a sign of Addison disease and needs a doctor.
