Pigmentation

Pigmentation 101: What Causes Dark Spots and How to Manage Them With Skincare

You can spend months fading a dark spot and undo much of that progress over one sunny weekend. Excess pigment responds well to the right ingredients, and your results depend on knowing which type of pigmentation you have and which triggers keep making it darker.

If you are dealing with dark marks left behind by breakouts, patches of melasma or sun spots, everything below is written for you. If you are pregnant or breastfeeding, some of these ingredients are not for you, and we cover which ones in the Common questions section below.

Unlabeled amber and frosted dropper bottles beside a dish of golden serum and a folded teal cloth in soft morning light.

What is excess pigmentation?

Your skin contains cells whose job is to make a brown pigment called melanin. Melanin gives your skin its natural color, and it is also a defense system.

Excess pigmentation, also called hyperpigmentation, is what you see when a group of those cells produces more melanin than the skin around it. It shows up as a spot or patch darker than your natural skin tone. Post-breakout marks, melasma and sun spots are the most common examples.

Illustration of two tiled surfaces: one with uneven patches of darker brown tiles, and one with an even, uniform tone.
Excess pigment is a group of cells producing more melanin than their neighbors. Pigment ingredients work on that excess, not on your natural tone.

What is not excess pigmentation

Freckles are part of your natural coloring. Your genes decide whether you have them, and sun brings them out, which is why they darken in summer and lighten in winter. They are not a sign of skin damage, and they are not something we work on with pigment inhibitors. Your natural skin tone, birthmarks and moles are not excess pigmentation either.

The red or pink marks that can stay after a breakout are not pigment at all. They come from small blood vessels that stay dilated while your skin heals, which is why ingredients that slow melanin work on them differently from brown marks. Red marks usually fade on their own over three to twelve months. Azelaic acid and tranexamic acid both calm redness, which can help them fade sooner, and daily sunscreen keeps UV from making the redness last longer.

Why skin makes extra pigment

Excess pigment is your skin protecting itself. Melanin absorbs UV before it can reach and damage the deeper layers of your skin, and when your skin senses a threat, your pigment cells make extra melanin as protection. That extra melanin is what you see as a dark spot or patch.

Deeper skin pigments much easier, because the pigment cells in deeper skin respond more strongly to the same triggers. These are the triggers we see most often.

Sun

UV is the most common trigger of excess pigment. UV reaches your skin every day, including on cloudy days and through windows, and every unprotected hour adds to excess pigment. Visible light, including daylight indoors, can also darken pigment, especially melasma on deeper skin tones.

Inflammation

Inflammation is one of the root causes of aging skin, and it is also one of the strongest triggers of pigment. Irritation from products that are too strong for your skin, over-exfoliating, eczema and rashes can all leave dark marks behind.

Breakouts

An inflamed breakout is inflammation inside a pore, which is why breakouts so often leave a brown mark behind once they heal. Picking or squeezing pushes that inflammation deeper and makes the mark darker and longer lasting.

Skin trauma

Cuts, burns, scratches, waxing irritation and peels or lasers that were too strong for your skin can all leave pigment behind as the skin repairs itself.

Hormonal shifts

Pregnancy, hormonal birth control and other hormone changes can make pigment cells more active across larger areas of the face, such as both cheeks or the forehead. Hormones are one of the main drivers of melasma, alongside sun, heat and a family history of it.

Heat

Heat is a trigger that is easy to overlook. Saunas, hot yoga, steamy kitchens and long hot showers can make pigment flare, especially melasma, even when you have been careful about sun.

The most common types of pigmentation

Each type has a different cause, and the cause decides how far the pigment can be reversed.

Post-breakout marks

Flat brown, gray or purple-brown marks that stay where a breakout used to be. The same kind of mark can form after a scratch, a burn or a patch of irritation. They are more common and last longer on deeper skin tones. Brown marks sit closer to the surface and fade sooner. Gray or purple-brown marks sit deeper and can take a year or longer.

Melasma

Larger patches, usually on both sides of the face, across the cheeks, forehead, upper lip and bridge of the nose. Hormones, sun, visible light and heat drive it, and the skin underneath often has extra blood vessels that help keep the pigment cells active. It is more common in women and in medium to deeper skin tones.

Sun spots

Flat, clearly defined brown spots on the face, hands, chest and shoulders, usually appearing from your thirties onward. They build up from years of UV, and they do not fade on their own.

Preventing excess pigmentation

Prevention is much easier than reversal. Excess pigment can form within days, and fading it takes months, because pigment near the surface only fades as your skin sheds and replaces its surface cells, and pigment that sits deeper clears even more slowly.

Sunscreen every day

UV is the most common trigger, which makes sunscreen the most important part of preventing excess pigment. Choose a broad-spectrum sunscreen, which means it protects against UVA as well as UVB, with SPF 30 or higher. Apply it every morning and reapply it through the day.

Tinted sunscreens that contain iron oxides also shield your skin from visible light, which can make melasma worse, especially on deeper skin tones.

Reducing inflammation

Manage breakouts early, leave them alone rather than picking, and avoid over-exfoliating. Support your barrier every day with a hydrating serum and a moisturizer, and introduce new active ingredients slowly, because irritation is inflammation too.

Keeping heat down

If you have melasma, cooler showers and shorter saunas help, because heat widens the blood vessels in melasma-affected skin and makes the pigment cells more active.

Hormones

Hormones cannot be controlled, but sometimes they can be managed with your doctor. If your melasma started or got worse after starting hormonal birth control or another hormone medication, ask your doctor whether a different option suits you.

Swatches of tinted mineral sunscreen in light, medium and deep shades beside an unlabeled tube and compact in bright sunlight.
Tinted sunscreens with iron oxides protect against visible light as well as UV, which helps with melasma.

Reversing excess pigmentation

How far pigment can be reversed depends on the type you have. In every case, pigment inhibitors help.

Post-breakout marks can fade for good

Once a breakout has healed and the inflammation behind it is gone, the trigger for that mark is gone too. Post-breakout marks can fade on their own, but slowly, often over six to twelve months. Pigment inhibitors slow the extra melanin those pigment cells are still making, and calming inflammation with barrier support and acne ingredients that reduce redness keeps new marks from forming while the old ones clear. As your skin sheds the pigmented surface cells, the mark fades. As long as you keep new breakouts under control and protect your skin from the sun, that mark does not come back.

Melasma and sun spots need ongoing care

Melasma is an ongoing skin condition. The hormones, sun, heat and extra blood vessels behind it are still there after the patches fade, which is why melasma usually returns if you stop using pigment inhibitors and daily sunscreen. Sun spots form where the same patch of skin has taken UV for many years. Repeated UV damages the surface cells in that patch, and once damaged, they keep sending signals that ask for pigment, even on days without sun. Over time the patch also gains more pigment cells than the skin around it. The result is a small area that stays switched on, which is why sun spots do not fade on their own.

Both improve with pigment inhibitors and daily sunscreen, melasma often by a great deal and sun spots more gradually, and both need ongoing care rather than a course you finish. Sun spots that do not lighten enough can also respond to procedures such as lasers with a trained provider, and daily sunscreen and pigment inhibitors keep them from coming back afterward.

What are pigment inhibitors?

Pigment inhibitors are ingredients that reduce how much excess pigment your skin makes. They do not make your natural skin tone lighter. They work on excess pigment, and as that excess fades, a mark moves back toward your natural tone rather than past it. What you are working toward is an even tone, not a lighter one.

Making pigment happens in three stages. First, a trigger such as UV, heat, inflammation or hormones prompts your surface cells to ask your pigment cells for more melanin. Your pigment cells then make melanin, using an enzyme called tyrosinase. Finally, that melanin is passed up to your surface cells, where you see it as a dark patch. Pigment inhibitors are grouped by the stage they work on.

Pigment inhibitors reduce new excess pigment rather than erasing what is already there. The marks you can see fade because your skin sheds and rebuilds its surface over four to six weeks, and the cells coming up carry less pigment than the ones they replace.

Stage one: reducing the signal that asks for pigment

Tranexamic acid

When UV, heat or hormones stimulate your skin, your surface cells send a signal asking your pigment cells for more melanin. Tranexamic acid stops your skin from forming plasmin, an enzyme in that signaling chain, which means fewer requests reach your pigment cells. It also calms the extra blood vessels in melasma-affected skin, which is why it is especially helpful for melasma.

Stage two: slowing how much pigment is made

Arbutin

Arbutin slows tyrosinase by sitting in the spot where the enzyme would pick up its raw material. It is a gentle place to start with sun spots and post-breakout marks.

Kojic acid

Kojic acid slows tyrosinase by binding the copper the enzyme needs to work. It comes from koji, the fungus used to make sake, soy sauce and miso. Skincare products use it at up to one percent, the level European and US safety reviews have confirmed as safe.

Vitamin C

Vitamin C slows tyrosinase as well, and it is an antioxidant, which means it neutralizes free radicals, the unstable molecules that UV, pollution and heat create, which also trigger your skin to make more pigment.

Stage three: reducing how much pigment reaches your surface cells

Niacinamide

Niacinamide works at the last stage, reducing how much finished pigment is passed to your surface cells. It also supports your barrier while it works.

Mandelic acid and azelaic acid also slow tyrosinase, and they are covered in the Acne ingredients that also work on pigment section below.

Pigment inhibitors work well together, because each one acts at a different stage of the same process. A formula that combines two or three of them works on excess pigment at more than one stage at once, and each ingredient can be used at a lower strength that is easier on your skin. A product built around one pigment inhibitor works well too, and it can be paired with a second product that works at a different stage.

A bowl of rice, a sprig of bearberry leaves, a halved orange and two unlabeled dropper bottles on stone.
Kojic acid comes from the fungus used to ferment rice, arbutin is found in bearberry leaves, and vitamin C is found in citrus.

What about hydroquinone?

Hydroquinone is one of the strongest pigment ingredients available. It slows tyrosinase and also reduces the activity of the pigment cells themselves. In the US, hydroquinone has been available only by prescription since 2020.

Hydroquinone is not meant for continuous use. It is usually prescribed in courses of around three months, followed by a break of around the same length. The most common side effects are redness, stinging, dryness and peeling. Used for too long without breaks, it can rarely cause exogenous ochronosis, a blue-gray darkening of the skin that is very hard to reverse, and the risk is higher on deeper skin tones. Hydroquinone is also avoided during pregnancy and breastfeeding.

If your doctor approves, you can use other pigment inhibitors alongside hydroquinone during a course. Once the course ends, keep using non-hydroquinone pigment inhibitors to maintain your results, because they can be used every day for the long term.

Acne ingredients that also work on pigment

If you have breakouts and the marks they leave behind, several acne ingredients also work on excess pigment, which means one product can help with both.

Azelaic acid

Azelaic acid slows tyrosinase, especially in pigment cells that are overactive, while it reduces acne bacteria and calms redness. It suits sensitive skin and deeper skin tones especially well, and it is usually recommended during pregnancy and breastfeeding.

Mandelic acid

Mandelic acid exfoliates, reduces acne bacteria and slows tyrosinase. It has a larger molecule than glycolic and lactic acid, which means it enters the skin more slowly and is less likely to cause the irritation that triggers more pigment. That is why mandelic acid is a great choice for acne-prone, deeper skin tones dealing with breakouts and post-breakout marks together.

Glycolic acid

Glycolic acid loosens the surface cells holding pigment, which helps marks fade faster. Glycolic peels are among the most studied options for melasma and post-breakout marks. Glycolic acid mainly works by clearing pigmented surface cells rather than slowing tyrosinase, which is why it works so well alongside a pigment inhibitor.

Retinoids

Retinoids speed up how quickly your skin replaces its surface cells, which carries pigmented cells away sooner, and they reduce how much pigment is passed up to the surface. Retinoids are also part of the most studied prescription combinations for melasma.

Go slowly with acids and retinoids. Irritation and the dryness that follows can trigger more pigmentation, and deeper skin pigments much easier.

Whole almonds, stalks of wheat and pieces of green sugar cane beside two unlabeled dropper bottles on stone.
Mandelic acid was first made from bitter almonds, azelaic acid is found in grains such as wheat and barley, and glycolic acid is found in sugar cane.

Prevention is key

Every ingredient above works better on skin that is protected from the triggers that started the pigment. Without sunscreen, the sun keeps triggering new pigment while you are working to fade the old.

Sunscreen matters just as much while you manage acne. Sun on a healing breakout darkens the mark it leaves behind and makes that mark last longer, which is why wearing and reapplying sunscreen every day makes post-breakout marks fade faster, even on skin that is breaking out. If sunscreen seems to cause breakouts for you, look for a lightweight formula labeled non-comedogenic, which means it is made not to clog pores.

A straw sun hat and sunglasses resting in the shade of palm fronds beside a glass of iced water and an unlabeled sunscreen tube.
Shade and a hat help on long days outside, alongside sunscreen reapplied through the day.

Common questions

Will pigment inhibitors make my skin lighter?

No. Your natural skin tone comes from your genes. Pigment inhibitors reduce the extra melanin that triggers such as sun, inflammation and hormones switch on, which is what makes a spot or patch darker than the skin around it.

How long until dark marks fade?

Expect eight to twelve weeks before you see a clear difference in brown post-breakout marks. Sun spots and melasma usually take three to six months, and gray post-breakout marks can take a year or longer, because pigment that sits deeper does not leave with your surface cells. Around weeks four to six, progress can look stalled, and more time with no changes is usually the better move. Photograph your skin on day one, in the same spot and natural daylight, and again every four weeks, which lets you see the change side by side.

Should I apply pigment products only on my dark spots?

Not always. It depends on what is causing them. For a mark from an occasional pimple, applying your pigment product only to that mark is fine.

If you have frequent or widespread inflamed breakouts, apply it across the whole area, because each new breakout can leave pigment behind, and covering the area works on that pigment as it starts to form. For melasma and sun spots, apply it across the whole area too, because excess pigment you cannot see yet is already forming around the patches you can see.

Can I use pigment inhibitors with retinoids and exfoliating acids?

Yes. Pigment inhibitors slow how much excess pigment is made, and retinoids and exfoliating acids clear pigmented surface cells sooner, which means they work on the same marks in different ways. If you are adding several new products, bring them in one at a time so you can tell what your skin is responding to.

Which pigment ingredients can I use during pregnancy?

Some ingredients, such as azelaic acid and mandelic acid, are commonly used during pregnancy and breastfeeding, and some pigment inhibitors, such as vitamin C and niacinamide, are generally considered safe as well. Retinoids are the ones to avoid.

Beyond that, which ingredients you use depends on your doctor's advice and your own preference, so check with your OB or midwife before you start anything new.

How to use it

  • Apply a broad-spectrum sunscreen with SPF 30 or higher every morning, and reapply it through the day, including while you manage breakouts.
  • Most pigment inhibitors are serums, which go on after cleansing and before your moisturizer. If yours is a cream, that is your moisturizer step.
  • Apply pigment products across the whole area if you have melasma, sun spots or frequent breakouts. For a mark from an occasional pimple, applying only to that mark is fine.
  • Introduce one new product at a time, and add the next one after a couple of weeks if your skin is doing well.
  • Start exfoliating acids and retinoids two to three nights a week, and use them more often as your skin allows.
  • Use retinoids and exfoliating acids on alternate nights rather than the same night.
  • If you have melasma or sun spots, keep your pigment inhibitors going once the marks fade.

Good to know

  • Stinging above a mild tingle, or lingering redness, means you are using an ingredient too often or at too high a strength for your skin barrier.
  • Do not apply exfoliating acids, retinoids or hydroquinone to broken, picked or sunburned skin.
  • Keep exfoliating acids and retinoids away from your eyes, lips and the corners of your nose unless the product is made for those areas.
  • Vitamin C and kojic acid can both turn darker as they oxidize. Follow the storage directions on your packaging, and replace the product once it has clearly changed color.
  • If you have a personal or family history of blood clots, or take medication that affects clotting, mention it to your doctor before starting tranexamic acid.

Pigmentation is personal. Everybody is different, and the same-looking mark can have a different cause from one person to the next. Give a new routine three to six months before deciding it is not working. With daily sunscreen and the right pigment inhibitors for your type of pigmentation, your skin tone can become much more even.

If you would like help working out which type of pigmentation you have and the routine that suits it, we would love to take a look at your skin together, whether that is a virtual consultation or a visit to our New York City LAZ Clinic.

Book a consultation

If a product causes swelling, real burning, or a rash that spreads, stop using it and see a doctor. If you have any difficulty breathing, swelling of the face, lips or throat, or you feel faint, treat that as an emergency and seek medical care immediately. Once your skin has settled, we are happy to look at your routine with you and work out what to adjust.

A mole that changes shape, color or size, or a spot that bleeds and does not heal, is something to show your doctor.

Everything here is general education rather than personal advice. If a doctor is treating you or you use prescription skincare, check with them before changing your routine.

Products and supplements mentioned here are not intended to diagnose, treat, cure or prevent any disease, and these statements have not been evaluated by the Food and Drug Administration.