Why are your lips dark, and should you worry? Most of the time the cause is harmless: natural colour, sun, smoking or irritation. Sometimes it is a medicine, a vitamin shortage or a medical condition, and occasionally it is a spot that needs a doctor's eyes.
The colour alone won't tell you which. The timing, the pattern and any other symptoms matter more, as Deconstruct points out. This self-check helps you sort what you are seeing. It is not a diagnosis.
Step 1: Is it a change, or your normal?
Lip colour varies a lot between people. Medical News Today says natural lip colour needs no treatment, and that dark lips are not a sign of an underlying condition unless the colour has changed over time. So the first question is: have your lips always looked like this?
Step 2: Match what you notice
|
What you notice |
What it may suggest |
What to do |
|---|---|---|
|
Dark for as long as you can remember, evenly, and similar to relatives |
Natural or inherited colour; genetics is a common cause |
Nothing needed. A daily SPF balm keeps it from getting darker |
|
Darker since you started smoking, sometimes with dark gums and fine lines around the mouth |
Smoking-related pigmentation, called smoker's melanosis |
See our guide to dark lips from smoking |
|
Darker mostly on the lower lip, you spend time outdoors and skip lip SPF |
Sun. The lower lip is far more likely to burn than the upper |
Daily SPF 30+ lip balm |
|
Dark or stained rim, dryness or redness, you lick your lips, or you changed lipstick, balm or toothpaste |
Irritation or an allergic reaction. Lip licking causes repeated irritation, and expired lip products can change lip colour |
Stop the new product, stop licking, and see if it settles over weeks |
|
Darkening started after a new medicine |
Some medicines, including some antimalarials, antipsychotics and anticonvulsants, can change lip pigment |
Talk to your doctor or pharmacist. Don't stop prescribed medicine on your own |
|
Darkening along with dark patches elsewhere, tiredness or weight loss |
Possible Addison's disease or a vitamin B12 or folate shortage |
See a doctor for tests |
|
A single new dark spot, or several new spots |
Often harmless, but needs checking |
See a doctor or dentist |
|
Lips darkening during pregnancy |
Hormonal changes are a recognised cause |
Mention it at your next check-up |
More than one of these can apply at once. Clinical guidance cited by Deconstruct notes that lip discolouration can have several causes together.
Step 3: Check for red flags
Most dark spots on lips are harmless. A freckle-like spot called a melanotic macule is by far the most common cause, and one dental source says it accounts for 86.1% of oral lesions involving melanin. But rare serious causes exist, so see a doctor or dentist if any of these apply:
- A new dark spot, or numerous new spots. A dermatologist quoted by The Healthy says any new dark spot on the lip is worth having evaluated.
- A spot that changes quickly, becomes raised, bleeds, hurts or forms a sore that doesn't heal, as listed by Deconstruct.
- Colour that has changed over time without a clear cause, or that doesn't improve after you remove the likely trigger.
- Other symptoms such as unexplained weight loss, fatigue or fevers.
- Darkening that started after a new medicine.
Don't wait for pain. Healthline notes that oral melanoma is very rare, but in its early stages it often causes few symptoms.
What the doctor may do
A doctor or dentist will look at the spot's size, shape, colour and position, and ask about your history. If they are unsure, they may take a small sample (a biopsy) to tell a harmless spot from melanoma or another cancer. A harmless melanotic macule usually needs no treatment.
What to do in the meantime
- Take a photo in the same light every week or two, so you can show changes. Ubie suggests photographing a spot every one to two weeks.
- Wear SPF 30+ lip balm every day.
- Skip harsh home remedies. Lemon, vinegar and aggressive scrubbing can irritate lips, which can darken them. See why lemon and vinegar can burn and how often to scrub.
- Book the appointment if any red flag applies. Don't wait for the "perfect" time.
FAQ
Are naturally dark lips unhealthy?
Natural lip colour is not a health problem and doesn't need treatment.
I don't smoke. Why are my lips dark?
Natural colour, sun, irritation, a product reaction, a medicine, pregnancy or a nutrient shortage are all possible. Use the table above to narrow it down.
Can I lighten naturally dark lips?
Creams, chemical peels and laser are cosmetic options a dermatologist can discuss. Home remedies aim to improve appearance rather than change your natural colour.
Should I see a dentist or a dermatologist?
Either is a good start. Dentists often notice lip and mouth changes, and they can refer you if needed.
This article is general information, not medical advice and not a diagnosis. If you are worried about a change in your lips, see a healthcare professional.