What kind of hyperpigmentation are you treating?
Hyperpigmentation means areas of skin become darker because of extra melanin, the pigment that gives skin its color. Sun damage, hormonal changes, medicines and skin injuries can cause it. Some vitamin deficiencies and hormone disorders can also contribute, so unexplained pigmentation is not automatically a skincare problem.1
Postinflammatory hyperpigmentation is the discoloration left after inflammation or injury, such as acne, eczema or a burn. The mark appears where the original problem healed. Anyone can develop these marks, but they tend to be darker and last longer in darker skin tones. Sunlight can darken them further.2
Melasma is another cause of uneven facial color. Pregnancy, birth control pills and sunlight can trigger it. A dermatologist can distinguish melasma from other conditions and assess how deeply the pigment sits, which helps determine treatment.3
How to build a routine that helps
- 1Address the trigger first. Treat ongoing acne or eczema rather than only its leftover marks. Switch away from irritating skincare.
- 2Apply tinted, broad spectrum sunscreen with iron oxide before going outside. Choose SPF 30 or higher and water resistance. Iron oxide protects against visible light, which can contribute to dark spots.
- 3Reapply sunscreen every two hours outdoors and after swimming or sweating. Wear a wide brimmed hat.
- 4Add a pigment treatment using its directions. Azelaic acid, glycolic acid, kojic acid, retinoids and vitamin C are options.
- 5Stop a skincare product if it burns or stings. Irritation can create more dark spots.
For exposed postinflammatory marks, daily broad spectrum SPF 50 or higher helps limit darkening. Creams mainly target pigment in the upper skin layers; deeper pigment is harder to treat. Combining treatments is often necessary for significant improvement, but that is a treatment plan, not a reason to give every bottle in the bathroom a promotion.2
Wash and moisturize your skin regularly, and avoid picking pimples. If you suspect a prescription medicine is causing discoloration, ask the prescriber about alternatives rather than stopping it yourself.14
Does azelaic acid help with hyperpigmentation?
Yes. Azelaic acid reduces pigmentation and treats acne, making it useful when breakouts leave persistent brown marks. It is also used for melasma. Available medicinal preparations include 15% gel and 20% cream or lotion, although approved uses differ by country.5
For acne, azelaic acid cream is started once daily after cleansing, then increased to twice daily if tolerated. Follow the directions for your particular product or prescription rather than transferring that schedule to every formula. Acne can begin improving after about a month, with maximum improvement after six months; dark mark fading has a variable timeline.5
Azelaic acid does not cause increased sun sensitivity, but sun protection still matters for pigmentation. Very sensitive skin or eczema can make it irritating. Avoid it if you are allergic to azelaic acid or another formula component. Stop and seek medical advice for severe redness, scaling, itching or burning, or worsening asthma. Skin lightening can be more noticeable in darker skin tones.5
Does glycolic acid help hyperpigmentation?
Yes. Glycolic acid is an alpha hydroxy acid, an exfoliating ingredient used for irregular pigmentation and age spots. Alpha hydroxy acid creams and lotions can help, but they can also cause irritation and sun sensitivity.6
For an alpha hydroxy acid product, start every other day and increase toward daily use only as your skin tolerates it. Keep the starting concentration no higher than 10% to 15%, and apply sunscreen every morning. A professional glycolic peel is a different treatment from a home cream, not simply the same purchase with more ambition.6
Does mandelic acid help hyperpigmentation?
A professional peel combining mandelic acid with salicylic acid can improve pigmentation left by acne. In a small trial of 45 people with acne and darker skin types, a 20% salicylic acid and 10% mandelic acid peel improved pigmentation scores over 12 weeks. A 35% glycolic peel and a phytic acid peel also improved scores.7
The benefit of mandelic acid alone in a home serum remains uncertain. These were dermatologist performed peels given in six sessions, not everyday skincare. If you are considering a peel for acne marks, discuss a professional treatment rather than copying those concentrations at home.7
Does adapalene help with hyperpigmentation?
Yes. Adapalene gel is one of the retinoid options used to fade dark spots, alongside retinol, tretinoin and tazarotene. Control the cause of new marks and protect your skin from sunlight as well. Pigment treatment is more effective once those triggers are addressed.4
What other treatments are available?
Retinol can improve mottled pigmentation; prescription tretinoin is a stronger vitamin A treatment. Kojic acid slows melanin production, but continued use can increase susceptibility to sunburn. Hydroquinone lightens hyperpigmentation and can cause allergic reactions. For melasma, hydroquinone is a prescription treatment in the United States, not an ordinary cosmetic purchase.36
Melasma treatment often combines sun protection with prescription medication. Options include hydroquinone, tretinoin with a mild corticosteroid, or a triple combination cream containing all three. Gentler alternatives include azelaic acid, kojic acid or vitamin C. Apply prescribed melasma medication before sunscreen, then camouflage makeup.3
Peels, lasers and intense pulsed light can help pigment in the upper skin layers, but injury from these procedures can worsen postinflammatory pigmentation. They do not effectively treat deeper postinflammatory pigment. For melasma procedures, choose a board certified dermatologist who can select treatment for your skin tone and pigment depth.23
How long does fading take?
After the cause stops, a spot a few shades darker than your skin usually fades within 6 to 12 months. Deeper pigment can take years. Treatment can speed fading, but new spots can form.4
Melasma treatment usually takes 3 to 12 months to show results, sometimes longer for longstanding patches. Pregnancy triggered melasma can fade after delivery, while other cases persist for years. Maintenance sun protection helps prevent its return.3
When should you see a doctor?
Get medical advice if darkened skin is painful, itchy, red, hot or leaking blood or pus. Hyperpigmentation itself does not cause those symptoms. A clinician can review your medicines, examine the pigmentation and investigate possible underlying causes. Seek a dermatologist's help when treatment is not improving the patches or you need prescription options.14
Where this answer comes from
- 1Hyperpigmentation: What it is, Causes, & Treatmentmy.clevelandclinic.org
- 2Postinflammatory hyperpigmentationdermnetnz.org
- 3Melasma: Diagnosis and treatmentaad.org
- 4How to fade dark spots in darker skin tonesaad.org
- 5Azelaic acid: Uses, Application and Moredermnetnz.org
- 6Popular Skin Care Ingredients Explainedhealth.clevelandclinic.org
- 7Comparative Study of 35% Glycolic Acid, 20% Salicylic–10% Mandelic Acid, and Phytic Acid Combination Peels in the Treatment of Active Acne and Postacne Pigmentapmc.ncbi.nlm.nih.gov