Lip Hyperpigmentation Treatment: Causes, Laser Evidence and Red Flags

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Lip hyperpigmentation treatment depends on the cause, so a diagnosis comes first. No controlled trial in our sources tests a cream or serum on dark lips. Laser has the most direct data, mostly from uncontrolled case series plus one small randomized trial comparing 2 lasers without a sham group, and a new, changing or irregular spot needs a doctor's exam, not a product.

Evidence: Early / preliminary.

Key takeaways

• A 2012 review lists physiologic changes, inherited skin conditions, inflammatory disease, endocrine disorders, drugs, chemicals and tumors among the causes of lip hyperpigmentation (Vachiramon & McMichael, 2012).
• Kerkar and colleagues wrote in 2021 that topical treatment for lip pigmentation "requires longer time and is often unsatisfactory" (Kerkar et al., 2021), and no controlled topical lip trial appears in our sources.
• In a 70-patient uncontrolled series, all patients cleared with a 532 nm laser (Kunachak et al., 2001), but a 24-patient pilot found no significant change in mean scores and 25.0% had worsening or mottling (Al-Haddab et al., 2021).
• The only randomized lip laser trial in our sources (30 people, evaluator-blinded, no sham group) found a single 532 nm session beat 5 low-fluence 1064 nm sessions on melanin index, but side effects occurred only with 532 nm (Limpjaroenviriyakul et al., 2020).
• Smoking is linked to lip pigmentation: odds ratio 5.6 in a 213-man case-control study (Haresaku et al., 2007).
• A 2022 review reports that actinic cheilitis, a sun-related lip condition, turns malignant at a rate of 10% to 30% (Vasilovici et al., 2022).
• A 2022 systematic review of 149 syndrome cases found that oral pigment appeared before the syndrome was diagnosed in 74.50% (Ferreira et al., 2022).

What causes lip hyperpigmentation?

Lip hyperpigmentation can come from natural pigment, smoking, inflammation, medicines, inherited syndromes or tumors. The pattern on your lips offers clues, but it can't confirm the cause on its own.

The 2012 review builds its diagnostic approach on 3 questions: how far the pigment extends, when it began and whether other body systems are involved (Vachiramon & McMichael, 2012). The authors caution that color is subjective and that some of the data come from case reports and small case series.

A 2018 review sorts oral pigment into focal lesions, such as melanocytic nevi (pigment-cell moles), and diffuse patterns, such as physiologic pigment, smoker's melanosis, and drug-induced or post-inflammatory darkening (Lambertini et al., 2018). The review notes that this split isn't always clear in practice.

No step in a skincare routine can separate these causes, which is why diagnosis comes before lip hyperpigmentation treatment. Evidence: Limited.

How do sun and smoking cause lip hyperpigmentation?

Both matter, but the evidence differs. Smoking is tied to lip pigment in observational studies, while the best-documented sun problem on the lip is actinic cheilitis, a precancerous condition rather than simple darkening.

A 1993 paper states that tobacco smoking is the main cause of oral melanin pigmentation besides genetic factors (Hedin et al., 1993). It describes smoker's melanosis disappearing in 2 patients after they cut back considerably. That pigment was in the buccal mucosa (inside the cheek), not on the lip. This is case-level evidence, with duration and funding not reported in the abstract.

Lip-specific data are stronger than that. In a case-control study of 213 male employees assessed from photos, 73% of those with lip pigmentation were current smokers, compared with 33% of those without it. The odds ratio of current smoking for lip pigmentation was 5.6 (95% CI 2.8-11.1), and pigment scores rose with daily consumption, duration and lifetime exposure (Haresaku et al., 2007). PubMed tags it as non-U.S.-government research support; the funder isn't named. A second study compared 109 smokers with 109 non-smokers: all smokers had lip and gingival pigmentation, two-thirds of non-smokers had none, and mean lip pigmentation scores were 7 times higher in smokers (Multani, 2013). Funding was not reported in that abstract. Both designs show an association, not that quitting reverses lip color.

Actinic cheilitis, also called solar cheilosis, usually affects the lower lip and comes mainly from chronic sun exposure (Alomary et al., 2024). A 2022 review, which declared no commercial conflicts, describes dryness, scaling, thinning, indistinct borders and erosions (Vasilovici et al., 2022). Risk factors include chronic UV exposure, older age, male sex, fair skin, immunosuppressive therapy and tobacco use.

Treatments for this condition range from laser and topical agents to photodynamic therapy, cryotherapy and surgery (Alomary et al., 2024). Those are options for a premalignant disease, not cosmetic lip lightening.

No study in our sources tests whether lip sunscreen prevents or fades lip darkening. Using one is reasonable sun protection, but that use remains untested for pigment. For general sun protection numbers, see SPF 30 vs 50. Evidence: Early / preliminary for lip pigment; Limited for actinic cheilitis (reviews).

Can lip products, eczema or medicines darken your lips?

Yes, but the lip-specific evidence is mostly case-level. Contact allergy and eczema-related spots are documented in small reports, while the main drug figure covers skin overall.

Contact allergy. A systematic review of pigmented contact cheilitis searched 2,070 articles and found only 7 cases (Figueiredo et al., 2024). Six were female, the mean age was 32, and the condition had been present for a mean of 13.5 months. Ricinoleic acid and gum ester were the most frequent allergens, in 2 cases each. The abstract doesn't say which products contained them, so we can't tie this finding to a particular lip balm or lipstick. A dermatologist can look for an allergic trigger. The authors declared no conflicts.

Eczema. One case report describes multiple labial melanotic macules, which are flat dark lip spots, after tacrolimus 0.1% ointment and pimecrolimus 1% cream were used for chronic lip dermatitis (Shi et al., 2014). A separate report describes 2 children of Chinese descent with atopic dermatitis who developed similar spots without using those medicines (Katsiaunis et al., 2025). The authors suggest the spots may be a feature of chronic eczema itself. Case reports can't show cause, so any concern about these medicines belongs with your prescriber.

Other medicines. A 2001 review says drugs account for 10% to 20% of acquired hyperpigmentation, a figure for skin overall rather than lips (Dereure, 2001). It names nonsteroidal anti-inflammatory drugs, antimalarials, amiodarone, cytotoxic drugs, tetracyclines, heavy metals and psychotropic drugs as the main culprits. Sun exposure often makes this pigment worse, and it may last a long time or become permanent in a small percentage of patients.

Never stop or change a medicine on your own. Take the question to your prescriber. Evidence: Early / preliminary.

Is there a proven topical lip pigmentation treatment?

No. No controlled trial in our sources tests tranexamic acid, vitamin C, hydroquinone, kojic acid or any other topical lip pigmentation treatment on lip hyperpigmentation.

The closest statements come from laser papers. Kerkar and colleagues wrote that topical treatment "requires longer time and is often unsatisfactory" (Kerkar et al., 2021). That line is the authors' framing in their introduction, not a measured result. Altalhab and colleagues similarly wrote that physiologic lip hyperpigmentation had no satisfactory treatment (Altalhab et al., 2022).

Evidence on topical brighteners comes from facial melasma and hyperpigmentation research. You can read those trials in our guides to tranexamic acid for skin and vitamin C for hyperpigmentation. Those results can't be assumed to transfer to lips, so we can't give a tested concentration, product type or timeline for lip use. Evidence: Early / preliminary (author statements; no lip trials).

Does laser work as a hyperpigmented lips treatment?

Laser can reduce lip pigment, but the size of the benefit is uncertain. No sham-controlled lip laser trial appears in our sources; the evidence is 1 small randomized trial comparing 2 lasers and 6 uncontrolled case series. Only 2 of the series (50 of 249 patients) specify physiologic lip pigmentation, and only 1 states patients' ethnicity (Thai).

The randomized trial enrolled 30 people with hyperpigmented lips and was evaluator-blinded. One group had 5 sessions of low-fluence Q-switched 1064 nm Nd:YAG laser 2 weeks apart; the other had a single session of Q-switched 532 nm laser. The 532 nm group had a greater reduction in melanin index and better photographic scores (p < 0.001 for both), measured 4 weeks after the last session (Limpjaroenviriyakul et al., 2020). Side effects were less likely with 1064 nm, and a few cases of scaling, hypopigmentation, blebs, post-inflammatory hyperpigmentation and lip swelling occurred only in the 532 nm group. Funding was not reported in the abstract, and there was no untreated or sham group.

Among the case series, four of the 6 used a Q-switched (QS) 532 nm Nd:YAG laser, a device that fires very short pulses. Another used a 755 nm picosecond laser, which has even shorter pulses, and the last used an ablative Er,Cr:YSGG laser, which was used to peel pigment away.

These numbers can't be ranked against each other because the studies used different patients, devices, endpoints and follow-up. Session counts describe what happened in those studies. They aren't a plan for your lips.

The Al-Haddab result deserves attention. Mean scores fell by only about 10% and the change wasn't significant, yet the authors still called the laser safe and moderately effective (Al-Haddab et al., 2021). With 25.0% of participants showing worsening or mottling, we read that conclusion cautiously.

For labial lentigines (flat lip spots) in Peutz-Jeghers syndrome, a 2022 review included 13 studies and 81 patients (Medeiros et al., 2022). Most patients (70.3%) received Q-switched alexandrite laser, and all studies reported satisfactory results with no further complications. Follow-up ranged from 2 to 97 months. These results apply to a syndrome that needs medical care, not to cosmetic dark lips in general. Evidence: Early / preliminary.

What are the risks of laser lip hyperpigmentation treatment?

The reported risks include cold sore reactivation, mottled or lighter patches, worsening pigment, recurrence and temporary swelling. Scarring wasn't reported in the 3 series that specifically addressed it. In the randomized trial, scaling, hypopigmentation, blebs, post-inflammatory hyperpigmentation and lip swelling occurred in a few patients, all in the 532 nm group (Limpjaroenviriyakul et al., 2020).

Herpes labialis, or cold sores, reactivated in 2 of 30 patients in one series (Altalhab et al., 2022) and 1 of 70 in another (Kunachak et al., 2001). Mottled hypopigmentation, meaning patchy light areas, affected 3 of 30 in the Altalhab series. In the ablative laser series, 82.4% had mild adverse effects, but the abstract doesn't itemize them (Agha et al., 2021).

Small uncontrolled series can miss uncommon harms, and they don't show whether results hold for all skin tones. No study in our sources tests whether laser could delay diagnosis of a dangerous lesion. Examining a lip spot before any laser is clinic convention, supported by reviews on when to biopsy rather than by a trial. Evidence: Early / preliminary.

How does a doctor choose a lip hyperpigmentation treatment?

A clinician starts by working out the cause. That usually means a medical history and exam, sometimes with dermoscopy or a biopsy, before any lip hyperpigmentation treatment is considered.

A 2018 review calls a full history, including drugs and smoking, and a general skin exam mandatory first steps (Lambertini et al., 2018). Dermoscopy, a magnified skin exam, can help separate melanocytic lesions from other conditions. When the clinical diagnosis is uncertain, a biopsy is needed, partly to exclude melanoma.

One 2025 case shows why asymmetry matters. A 56-year-old transplant patient on chronic immunosuppression, with 2 prior hyaluronic acid lip filler injections, developed irregular pigment on only her lower lip over 6 to 12 months (Kimpe et al., 2025). Biopsy showed melanosis, or increased melanin, along with solar elastosis (sun-damaged connective tissue) and hyaluronic acid deposits. It found no melanocytic hyperplasia, meaning no overgrowth of pigment cells. A single case can't show what caused the pigment, but only tissue testing could give that answer.

A 2025 review, prepared without funding, agrees that most oral pigmented lesions are benign but says they need careful evaluation and biopsy when indicated (Wolk et al., 2025). Evidence: Limited (expert reviews and a case report).

When is lip hyperpigmentation a reason to see a doctor?

See a dermatologist or doctor if a lip spot is new, changing or irregular, or if pigment comes with other symptoms. These signs don't mean cancer, but they do call for an exam, and a biopsy may be needed.

Book a check if any of these apply:

• ☐ A new dark spot on your lip, especially a single one
• ☐ A spot that is growing or changing
• ☐ Irregular color or an irregular border
• ☐ A patch that looks different from the rest of your lip color
• ☐ Bleeding or an ulcer
• ☐ A lump or nodule (Vasilovici et al., 2022)
• ☐ A scaly patch that won't heal
• ☐ Multiple spots on the lips and inside the mouth, which can signal a syndrome that needs a medical workup (Ferreira et al., 2022)
• ☐ New darkening after starting a medicine (talk to your prescriber, and don't stop it on your own)

Ulceration or a nodule often suggests that actinic cheilitis has progressed to invasive squamous cell carcinoma, a type of skin cancer (Vasilovici et al., 2022). Syndrome-related spots matter because the pigment came before the diagnosis in 74.50% of 149 reported cases, and the lip was the most affected site (Ferreira et al., 2022). Those cases came from case reports and series, so the numbers don't show how often lip spots signal a syndrome.

Melanoma of the lip skin is rare but serious. A SEER database analysis of 386 cases found a mean age of 62.4, 62.7% male patients and a 5-year overall survival of 75.2% (Viscardi et al., 2023). The authors declared no conflicts. Evidence: Limited (reviews and case data; these warning signs have not been tested in trials).

Where the evidence stops

• No sham-controlled lip trials. Our sources contain one small randomized trial comparing 2 lasers, but no sham-controlled laser study and no controlled topical study on lip pigment.
• No lip data for common brighteners. Facial trial results may not apply to lips.
• Unclear patient range. Most laser abstracts don't report ethnicity or skin type, and only 2 of 6 series specify physiologic pigment.
• Uneven outcomes. Scales, follow-up and definitions of success differ, so the results can't be pooled here.
• Uneven cause data. Smoking has observational lip data (a case-control study and a 109 vs 109 comparison), but those designs can't prove cause; contact allergy and eczema rest on small case-level reports.
• Untested prevention. We found no study showing that lip sunscreen prevents or fades lip darkening.

FAQ

References

1. Vachiramon V, McMichael AJ. Approaches to the evaluation of lip hyperpigmentation. Int J Dermatol. 2012. Narrative review with diagnostic algorithm; some data from case reports and small series; funding not reported in abstract. https://pubmed.ncbi.nlm.nih.gov/22715817/
2. Lambertini M, et al. Oral melanoma and other pigmentations: when to biopsy? J Eur Acad Dermatol Venereol. 2018. Narrative review; funding not reported in abstract. https://pubmed.ncbi.nlm.nih.gov/28862771/
3. Lambertini M, et al. Oral pigmentation in physiologic conditions, post-inflammatory affections and systemic diseases. G Ital Dermatol Venereol. 2018. Narrative review; funding not reported in abstract. https://pubmed.ncbi.nlm.nih.gov/28421728/
4. Wolk R, Massi D, Trochesset D. Pigmented Lesions of the Oral Mucosa: Clinical Presentation, Histology, and Recommendations for Management. Am J Clin Dermatol. 2025. Narrative review; no funding; no relevant conflicts. https://pubmed.ncbi.nlm.nih.gov/40369390/
5. Hedin CA, Pindborg JJ, Axéll T. Disappearance of smoker's melanosis after reducing smoking. J Oral Pathol Med. 1993. Comparison of former smokers and non-smokers plus 2 patient descriptions; buccal mucosa; n, duration and funding not reported in abstract. https://pubmed.ncbi.nlm.nih.gov/8315602/
6. Figueiredo AS, et al. Pigmented contact cheilitis: a systematic review. Med Oral Patol Oral Cir Bucal. 2024. Systematic review, 2,070 articles retrieved, 7 cases; no conflicts declared. https://pubmed.ncbi.nlm.nih.gov/39396149/
7. Shi VY, Joo JS, Sharon VR. Multiple labial melanotic macules occurring after topical application of calcineurin inhibitors. Dermatol Online J. 2014. Case report, n=1; funding not reported in abstract. https://pubmed.ncbi.nlm.nih.gov/25148283/
8. Katsiaunis A, Petrillo M, Robinson SN. Labial Melanotic Macules in Two Pediatric Patients of Chinese Descent With Atopic Dermatitis. Pediatr Dermatol. 2025. Case report, n=2; funding not reported in abstract. https://pubmed.ncbi.nlm.nih.gov/39888051/
9. Dereure O. Drug-induced skin pigmentation. Epidemiology, diagnosis and treatment. Am J Clin Dermatol. 2001. Review, skin overall rather than lip-specific; funding not reported in abstract. https://pubmed.ncbi.nlm.nih.gov/11705252/
10. Kimpe V, et al. Asymmetric Lip Hyperpigmentation in a Transplant Patient. Dermatopathology (Basel). 2025. Case report, n=1; no conflicts declared. https://pubmed.ncbi.nlm.nih.gov/41283483/
11. Ferreira LDS, et al. Oral pigmented lesions in syndromic individuals: A systematic review. Oral Dis. 2022. Systematic review of case reports and series, 108 articles, 149 cases, 9 syndromes; funding not reported in abstract. https://pubmed.ncbi.nlm.nih.gov/33394507/
12. Medeiros YL, et al. Laser therapy and light sources for labial lentigines in patients with Peutz-Jeghers syndrome. Dermatol Ther. 2022. Literature review, 13 studies, 81 patients, follow-up 2 to 97 months; funding not reported in abstract. https://pubmed.ncbi.nlm.nih.gov/35426222/
13. Alomary SA, et al. Solar cheilosis: a comprehensive narrative review. Ital J Dermatol Venerol. 2024. Narrative review; funding not reported in abstract. https://pubmed.ncbi.nlm.nih.gov/39898380/
14. Vasilovici A, et al. Actinic Cheilitis - From Risk Factors to Therapy. Front Med (Lausanne). 2022. Narrative review; no commercial or financial conflicts declared. https://pubmed.ncbi.nlm.nih.gov/35242781/
15. Viscardi JA, et al. Cutaneous Melanoma of the Lip: A SEER Analysis of Epidemiology and Survival Outcomes With Focus on Surgery and Other Treatment Options. In Vivo. 2023. Database analysis, 386 cases; no conflicts declared. https://pubmed.ncbi.nlm.nih.gov/37103103/
16. Kunachak S, et al. An effective treatment of dark lip by frequency-doubled Q-switched Nd:YAG laser. Dermatol Surg. 2001. Uncontrolled case series, n=70, follow-up 24 to 36 months; funding not reported in abstract. https://pubmed.ncbi.nlm.nih.gov/11231240/
17. Altalhab S, et al. Q-switched 532 nm Nd:YAG laser therapy for physiological lip hyperpigmentation: novel classification, efficacy, and safety. J Dermatolog Treat. 2022. Retrospective uncontrolled series, n=30, minimum 6 months of follow-up; funding not reported in abstract. https://pubmed.ncbi.nlm.nih.gov/32748662/
18. Al-Haddab M, Alali A, Al-Otiabi H. Efficacy and Safety of Q-switched Double-frequency 532-nm Neodymium-doped Yttrium Aluminum Garnet Laser in the Treatment of Lip Hyperpigmentation: A Pilot Study. J Clin Aesthet Dermatol. 2021. Prospective uncontrolled pilot, n=24, photos 3 months after treatment; no relevant conflicts. https://pubmed.ncbi.nlm.nih.gov/34840645/
19. Kerkar S, Shilpa K, Revathi TN. Efficacy of 532-nm Q-switched Nd:YAG Laser in the Treatment of Lip Melanosis. J Cutan Aesthet Surg. 2021. Prospective uncontrolled interventional study, n=20, total follow-up not reported; no conflicts declared. https://pubmed.ncbi.nlm.nih.gov/34566363/
20. Ng JNC, et al. The Efficacy and Safety of a 755-nm Picosecond Laser in the Treatment of Physiologic Lip Hyperpigmentation in Thai Patients. Dermatol Surg. 2022. Uncontrolled study, n=20, 6 months of follow-up after final treatment; funding not reported in abstract. https://pubmed.ncbi.nlm.nih.gov/36037096/
21. Agha MT, Polenik P, Hassan M. Er,Cr:YSGG 2780 nm Laser Treatment of Lip Melanin Hyperpigmentation. Int J Dent. 2021. Uncontrolled case series, n=85, follow-up length not reported; no conflicts declared. https://pubmed.ncbi.nlm.nih.gov/34335773/
22. Limpjaroenviriyakul N, et al. Low-fluence Q-switched Nd:YAG 1064-nm laser versus Q-switched Nd:YAG 532-nm laser in the treatment of hyperpigmented lips: a prospective, randomized, controlled, evaluator-blinded trial. Lasers Med Sci. 2020. Randomized evaluator-blinded trial, n=30, no sham arm, 4 weeks after last session; funding not reported in abstract. https://pubmed.ncbi.nlm.nih.gov/31177406/
23. Haresaku S, et al. Association of lip pigmentation with smoking and gingival melanin pigmentation. Oral Dis. 2007. Case-control study, n=213 men; PubMed tags it as non-U.S.-government research support; the funder isn't named. https://pubmed.ncbi.nlm.nih.gov/17241433/
24. Multani S. Interrelationship of smoking, lip and gingival melanin pigmentation, and periodontal status. Addict Health. 2013. Comparative study, 109 smokers vs 109 non-smokers; funding not reported in abstract. https://pubmed.ncbi.nlm.nih.gov/24494159/

Disclosure: This article is for general information only. It is not medical advice. Peptide Skincare has no affiliate links in this article and received no payment from any manufacturer mentioned. New, changing, single or irregular dark spots on the lips should be checked by a dermatologist. If you think a medicine is darkening your lips, talk to your prescriber; never stop or change a medication on your own.

For educational purposes only; not medical advice. See our disclaimer and research method.