If you've ever searched online for ways to treat dark circles, you've probably noticed one frustrating problem.
Everyone talks about dark circles as if they're all the same.
They're not.
Some people have blue or purple under-eyes caused by visible blood vessels.
Others have hollow under-eyes that create shadows.
But for millions of people, particularly those with medium to deeper skin tones, the problem is pigmentation.
Instead of looking blue, the skin beneath the eyes appears:
- Brown
- Tan
- Grey-brown
- Darker than the surrounding skin
This type of dark circle isn't caused by tiredness.
It isn't caused by poor circulation.
And it isn't something that appears overnight.
It's caused by melanin—the natural pigment responsible for the colour of your skin, hair and eyes.
Understanding why this pigment develops beneath the eyes is one of the most important steps towards choosing the right skincare routine.
In this guide, we'll explain the science behind under-eye pigmentation, why it develops, who is most likely to experience it and what current research tells us about supporting brighter, healthier-looking skin.
🧬 The Science in 30 Seconds
Pigmented dark circles are caused by excess melanin in the skin beneath the eyes.
Melanin is your body's natural pigment and is produced to help protect the skin.
Sun exposure, inflammation, frequent eye rubbing, genetics and hormonal changes can all contribute to increased pigmentation around the eyes.
Unlike temporary dark circles caused by tiredness, pigmented dark circles usually develop gradually and require patience and consistency to improve.
First things first: what is melanin?
Before we talk about pigmentation beneath the eyes, it's helpful to understand what melanin actually is.
Melanin is the natural pigment that gives colour to:
- your skin
- your hair
- your eyes
It's produced by specialised cells called melanocytes, which are found in the deepest layer of the epidermis (the outer layer of your skin).
Think of melanocytes as tiny pigment factories.
Their job is to produce melanin and distribute it to surrounding skin cells.
This pigment acts like the skin's natural sunscreen.
When ultraviolet (UV) rays from the sun reach your skin, melanocytes respond by producing more melanin to help protect the DNA inside your skin cells.
That's why many people develop a tan after spending time in the sun.
Melanin is not harmful.
In fact, it's an essential part of your body's natural defence system.
The problem occurs when melanin is produced unevenly or in excess, creating patches of darker skin known as hyperpigmentation.
Why does pigmentation develop beneath the eyes?
The skin beneath your eyes is unique.
It is:
- thinner than most areas of the face
- more delicate
- lower in natural oil glands
- constantly moving through blinking and facial expressions
These characteristics make changes in skin colour much easier to notice.
When extra melanin develops beneath this thin skin, even small increases in pigment can appear quite obvious.
Unlike a suntan on your arms or shoulders, under-eye pigmentation often stands out because it contrasts with the surrounding skin.
What is hyperpigmentation?
Hyperpigmentation simply means an area of skin has become darker than the surrounding skin because of excess melanin.
It's a descriptive term rather than a diagnosis.
There are several different forms of hyperpigmentation, including:
- Post-inflammatory hyperpigmentation (PIH)
- Sun-induced pigmentation
- Melasma
- Freckles
- Age spots
Around the eyes, post-inflammatory hyperpigmentation and UV-related pigmentation are among the most common causes.
Myth vs Fact
❌ Myth
Brown dark circles are caused by poor sleep.
✅ Fact
Poor sleep may make dark circles look more noticeable by increasing puffiness or making blood vessels appear more visible, but brown pigmentation itself is caused by excess melanin within the skin.
Who is most likely to develop pigmented dark circles?
Although anyone can develop pigmentation, some people are naturally more prone than others.
Research shows that pigmented dark circles are particularly common in people with:
- South Asian skin tones
- Middle Eastern skin tones
- African and Afro-Caribbean skin tones
- Hispanic skin tones
- Southeast Asian skin tones
This is because darker skin naturally contains more active melanocytes and produces more melanin.
That isn't a disadvantage.
In fact, higher melanin levels provide greater natural protection against UV damage.
However, they also mean the skin may respond more strongly to inflammation or irritation by producing additional pigment.
This is one reason post-inflammatory hyperpigmentation is more common in deeper skin tones.
Research Spotlight
Studies published in dermatology journals have shown that people with Fitzpatrick skin types IV–VI are more likely to develop post-inflammatory hyperpigmentation following skin irritation compared with lighter skin tones.
This highlights the importance of preventing unnecessary inflammation—particularly around the delicate eye area.
Pigmentation isn't just caused by the sun
One of the biggest misconceptions is that all pigmentation comes from sunlight.
While UV exposure is an important trigger, it's far from the only one.
Your body can increase melanin production in response to many different forms of stimulation.
These include:
- inflammation
- friction
- hormones
- skin injury
- oxidative stress
- certain medications
- genetics
The under-eye area is particularly vulnerable because it's exposed to many of these triggers every day.
The role of inflammation
Inflammation is one of the most important—but often overlooked—causes of pigmentation.
Whenever your skin becomes irritated, your immune system releases chemical messengers that help repair the damage.
As part of this healing process, melanocytes can become more active.
In some people, especially those with medium to deeper skin tones, this increased activity leads to extra melanin production.
Even after the irritation has resolved, the pigment may remain.
This process is known as post-inflammatory hyperpigmentation (PIH).
PIH can develop after:
- eczema
- allergic reactions
- dermatitis
- aggressive skincare
- repeated rubbing
- skin injuries
Understanding this process is essential because treating the pigment alone isn't enough.
You also need to reduce the inflammation that's triggering it.
Why rubbing your eyes can make pigmentation worse
It might seem harmless, especially if your eyes are itchy or tired, but repeatedly rubbing the delicate skin around your eyes can contribute to pigmentation over time.
The skin beneath your eyes is incredibly thin and has a relatively fragile barrier. Frequent rubbing creates repeated friction, which can trigger a mild inflammatory response.
Your body sees this friction as a form of skin injury.
As part of the healing process, inflammatory signals are released, and in some people, these signals stimulate melanocytes to produce more melanin.
This process is known as post-inflammatory hyperpigmentation (PIH).
Although anyone can develop PIH, it's generally more common in people with medium to deeper skin tones because melanocytes are naturally more active.
Common reasons people rub their eyes
- Hay fever
- Seasonal allergies
- Eczema
- Dry eyes
- Contact lenses
- Fatigue
- Screen-related eye strain
- Removing eye makeup too aggressively
If you regularly rub your eyes, identifying and managing the underlying cause is often just as important as treating the pigmentation itself.
🧠 Did You Know?
Research suggests that repeated skin irritation doesn't just damage the skin barrier—it can also stimulate pigment-producing cells, making post-inflammatory hyperpigmentation more likely in susceptible individuals.
How sunlight increases pigmentation
Many people associate sun exposure with tanning, but the same biological process can also contribute to pigmentation beneath the eyes.
When ultraviolet (UV) rays reach your skin, your body activates a protective response.
Melanocytes begin producing more melanin to help shield skin cells from DNA damage caused by UV radiation.
This response is completely normal and plays an important role in protecting your skin.
However, repeated sun exposure can lead to excess melanin accumulating in certain areas, particularly if you're already prone to pigmentation.
The under-eye area is especially vulnerable because:
- The skin is thinner than elsewhere on the face.
- Many people forget to apply sunscreen close to the eyes.
- Sunglasses aren't always worn outdoors.
- UVA rays can penetrate through clouds and glass, meaning exposure isn't limited to sunny holidays.
Even small amounts of repeated UV exposure can contribute to gradual darkening over time.
Research Spotlight
Ultraviolet radiation stimulates an enzyme called tyrosinase, which plays a central role in melanin production.
Tyrosinase acts like a switch inside melanocytes, helping convert the amino acid tyrosine into melanin.
Because tyrosinase is one of the key steps in pigmentation, many cosmetic ingredients designed to improve uneven skin tone are studied for their ability to influence this pathway.
Hormones and pigmentation
Hormones influence many aspects of skin biology, including pigmentation.
Some people notice that pigmentation becomes more noticeable during:
- pregnancy
- menopause
- hormonal contraception
- thyroid disorders
One well-known example is melasma, a form of hyperpigmentation often associated with hormonal changes and sun exposure.
Although melasma typically affects the cheeks, forehead and upper lip, hormonal changes can influence pigmentation elsewhere on the face, including around the eyes.
Hormones don't create pigment on their own, but they can increase your skin's sensitivity to other triggers such as UV exposure.
Can genetics cause pigmented dark circles?
Yes.
For some people, pigmentation beneath the eyes runs in the family.
If close relatives have naturally darker under-eyes, there's a greater chance you'll experience them too.
Genetics can influence:
- how much melanin your skin naturally produces
- how active your melanocytes are
- your skin tone
- the thickness of your skin
- your tendency to develop post-inflammatory hyperpigmentation
While you can't change your genetics, understanding them helps set realistic expectations.
Skincare can support healthier-looking skin and improve the appearance of pigmentation for some people, but it can't alter your inherited skin biology.
Oxidative stress and pollution
One factor that's receiving increasing attention is oxidative stress.
Every day your skin is exposed to environmental stressors such as:
- UV radiation
- air pollution
- cigarette smoke
- blue light from digital devices (research is still evolving)
- normal metabolic processes
These stressors generate unstable molecules known as free radicals.
When free radicals build up faster than your body's natural antioxidant defences can neutralise them, oxidative stress occurs.
Oxidative stress has been linked to premature skin ageing and may contribute to inflammation, which can indirectly influence pigmentation.
This is one reason antioxidant-rich skincare ingredients have become an important part of modern skincare routines.
Can pigmentation be prevented?
Not every cause of pigmentation can be prevented.
For example, you can't change your genetics.
However, many everyday triggers can be reduced.
Protect your skin from UV exposure
Daily broad-spectrum sunscreen remains one of the most effective ways to reduce further UV-induced pigmentation.
Avoid rubbing your eyes
If allergies or dry eyes are making you rub the area frequently, managing those underlying issues may help reduce ongoing irritation.
Support your skin barrier
A healthy skin barrier is better able to cope with environmental stress and recover from everyday irritation.
Choose gentle skincare products and avoid over-exfoliating the delicate eye area.
Manage inflammatory skin conditions
Conditions such as eczema and dermatitis can increase the likelihood of post-inflammatory hyperpigmentation.
Working with a healthcare professional to keep these conditions well controlled may help reduce repeated inflammation.
Ingredients that may support pigmented under-eyes
No cosmetic ingredient can permanently remove pigmentation overnight.
Instead, the goal is to support healthier-looking skin while addressing some of the biological processes involved in uneven skin tone.
Ingredients commonly used in pigmentation-focused skincare include:
Bakuchiol
May help support a more even-looking complexion while improving the appearance of fine lines and skin texture. Often well tolerated by sensitive skin.
Niacinamide
Helps strengthen the skin barrier and has been studied for its role in reducing the transfer of melanin to skin cells, contributing to a more even-looking skin tone over time.
Vitamin C
A powerful antioxidant that helps protect against oxidative stress and has been researched for its role in supporting brighter-looking skin.
Vitamin E
Supports the skin barrier and helps protect against environmental oxidative damage.
Rice Bran Oil
Rich in antioxidants and naturally occurring Vitamin E compounds that nourish the skin and support barrier function.
Kiwi Seed Oil
Provides omega-3 fatty acids that help maintain healthy skin and support hydration.
Blueberry Seed Oil
Contains antioxidant compounds that help defend the skin against environmental stress.
Myth vs Fact
❌ Myth
Brown dark circles mean you're tired.
✅ Fact
Pigmented dark circles are caused by excess melanin within the skin. Poor sleep may make them appear more noticeable, but it doesn't create the underlying pigmentation.
Frequently Asked Questions
Can pigmentation under the eyes disappear naturally?
Some forms of pigmentation may gradually improve if the trigger is removed, particularly post-inflammatory hyperpigmentation. However, genetics, hormones and ongoing UV exposure can influence how much improvement is possible.
Why are my under-eyes brown instead of blue?
Brown under-eyes are usually caused by increased melanin within the skin, whereas blue or purple dark circles are more commonly related to visible blood vessels beneath thin skin.
Does sunscreen help pigmented dark circles?
Daily sunscreen helps prevent additional UV-induced pigmentation and is considered an important part of managing uneven skin tone. It doesn't remove existing pigmentation on its own but can help stop it becoming more pronounced.
Can allergies cause brown dark circles?
Yes. Allergies can lead to frequent eye rubbing and inflammation, both of which may contribute to post-inflammatory hyperpigmentation in susceptible individuals.
Is pigmentation under the eyes permanent?
Not necessarily. The outlook depends on the underlying cause. Pigmentation caused by inflammation or UV exposure may improve over time with consistent skincare and sun protection, while genetically influenced pigmentation may be more persistent.
Can makeup removal cause pigmentation?
It can if it's done aggressively. Pulling or rubbing the delicate under-eye skin repeatedly may increase irritation over time. Using a gentle makeup remover and avoiding friction can help protect the skin barrier.
Final thoughts
Pigmented dark circles aren't simply a sign of tiredness—they're the result of complex biological processes taking place within the skin.
For many people, they're influenced by a combination of genetics, sun exposure, inflammation, allergies, hormones and daily habits such as rubbing the eyes.
Understanding these triggers is empowering because it shifts the focus away from quick fixes and towards informed, consistent skincare.
While no product can change your genetics or erase pigmentation overnight, protecting your skin from UV exposure, reducing unnecessary inflammation and choosing well-formulated skincare can all contribute to healthier-looking under-eye skin over time.
The first step isn't asking, "What's the best product?"
It's asking, "What's causing my pigmentation?"
Once you understand the answer to that question, you're in a much stronger position to build a routine that's appropriate for your skin and your goals.
📚 Scientific References
- Briganti S, Camera E, Picardo M. Chemical and instrumental approaches to treat hyperpigmentation. Pigment Cell Research. 2003.
- Davis EC, Callender VD. Post-inflammatory hyperpigmentation: A review of the epidemiology, clinical features and treatment options in skin of colour. Journal of Clinical and Aesthetic Dermatology. 2010.
- Slominski A, et al. Melanin pigmentation in mammalian skin and its hormonal regulation. Physiological Reviews. 2004.
- Grimes PE. Melasma. Etiologic and therapeutic considerations. Archives of Dermatology. 1995.
- Draelos ZD. Cosmetic Dermatology: Products and Procedures. 3rd Edition.
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