Melasma

What is melasma?

Melasma is a common skin condition that causes patches of darker skin, most often on the face. The medical term for this kind of darkening is hyperpigmentation, which simply means that certain areas of skin contain more pigment than the surrounding skin. In melasma, the cells that make skin pigment, called melanocytes, become overactive and produce too much melanin, the natural brown pigment that gives skin its color. In medical coding systems, melasma is listed under ICD-10 code L81.1, which places it among disorders of skin pigmentation.

When people ask what is melasma and how it differs from ordinary sun spots, the key points are its pattern and its triggers. Melasma usually appears as flat, brown or gray-brown patches with irregular edges, arranged symmetrically on both sides of the face. It is strongly linked to sun exposure and to hormonal changes, which is why it often develops during pregnancy. For this reason it is sometimes called the “mask of pregnancy” or, in older medical language, chloasma.

Melasma can affect anyone, but it is far more common in women than in men. It typically appears in adults between their twenties and forties. People with medium to darker skin tones, including those of Latin American, Asian, Middle Eastern, Mediterranean, and African descent, are more likely to develop it, because their melanocytes tend to respond more strongly to triggers such as sunlight. Melasma is not contagious, is not a form of skin cancer, and does not turn into cancer. However, because it appears on the face, it can affect confidence and quality of life, and many people seek treatment for cosmetic reasons.

Symptoms of melasma

Melasma symptoms are visual rather than physical. The condition does not usually cause itching, pain, burning, or any other sensation. If a pigmented patch is itchy, painful, scaly, or raised, it may be something other than melasma and should be examined by a doctor.

Typical melasma symptoms include:

• Flat patches of darker skin — light brown, dark brown, or gray-brown, depending on your natural skin tone and how deep the pigment sits.
• Symmetrical distribution — patches usually appear in a similar pattern on both sides of the face.
• Irregular but well-defined borders — the patches often have a lacy or map-like outline.
• No change in skin texture — the affected skin is smooth and level with the surrounding skin, not raised, rough, or scaly.
• Darkening after sun exposure — patches often become more noticeable in summer or after time outdoors and may fade somewhat in winter.

Doctors often describe melasma by its facial pattern. The most common is the centrofacial pattern, which involves the forehead, cheeks, nose, and upper lip. The malar pattern affects mainly the cheeks and nose, while the less common mandibular pattern appears along the jawline. Melasma can occasionally appear on other sun-exposed areas, such as the neck and forearms, though facial involvement is by far the most typical.

Melasma is also classified by how deep the extra pigment lies in the skin. In epidermal melasma, the pigment sits in the outermost layer of the skin (the epidermis); these patches tend to look well defined and dark brown, and they often respond better to treatment. In dermal melasma, the pigment lies deeper, in the layer beneath the surface (the dermis); these patches often appear gray-brown or bluish with softer edges and are usually more stubborn. Many people have a mixed type with pigment at both depths, which is common in longstanding melasma. This distinction matters because it helps explain why some patches fade readily while others persist despite treatment.

Causes and risk factors

The exact mechanism behind melasma is not fully understood, but doctors know that it results from overactive melanocytes producing excess pigment in response to certain triggers. Understanding melasma causes helps guide both treatment and prevention, because avoiding triggers is a central part of managing the condition.

The most important known causes and risk factors include:

• Sun exposure. Ultraviolet (UV) light from the sun is the single most important trigger. UV rays directly stimulate melanocytes to make more pigment. Even brief, repeated sun exposure can darken existing patches or bring melasma back after successful treatment. Visible light, particularly high-energy blue light, may also play a role, especially in people with darker skin tones.
• Hormonal changes. Melasma is strongly linked to the female hormones estrogen and progesterone. It commonly appears or worsens during pregnancy, and it can be triggered by birth control pills, hormone replacement therapy, and other hormonal medications.
• Genetics. Melasma often runs in families. In many cases, people with melasma report that a close relative has it too, which suggests an inherited tendency.
• Skin tone. People with medium to darker skin are more prone to melasma because their pigment cells are naturally more active and more reactive to light and heat.
• Female sex. The large majority of people with melasma are women, though men can also develop it, usually with sun exposure and family history as the main factors.
• Certain medications and products. Some drugs that make the skin more sensitive to light (photosensitizing medications), certain anti-seizure medicines, and some scented or irritating skin-care products may trigger or worsen melasma in susceptible people.
• Heat. There is some evidence that heat itself, separate from UV light, can stimulate pigment production, which may explain why melasma sometimes worsens with hot environments such as saunas or intense kitchen heat.
• Thyroid disease. Some studies have found an association between melasma and thyroid disorders, although the connection is not fully established.

It is worth stressing that melasma is not caused by poor hygiene, diet alone, or anything the affected person did wrong. It is a biological response of pigment cells to a combination of genetic predisposition, hormones, and light exposure.

Diagnosis

Melasma diagnosis is usually straightforward and is made clinically, meaning the doctor identifies it by looking at the skin and asking about your history. A dermatologist, a doctor who specializes in skin conditions, can typically recognize melasma from its characteristic color, symmetrical pattern, and location on the face.

During the visit, the doctor will usually ask about:

• When the patches first appeared and whether they change with the seasons
• Pregnancy history and use of hormonal medications such as birth control pills
• Sun exposure habits and use of sunscreen
• Family history of melasma or other pigment conditions
• Skin-care products and medications you currently use

Several simple tools can support the diagnosis:

• Wood’s lamp examination. This is a handheld lamp that shines ultraviolet light on the skin in a darkened room. It helps the doctor estimate how deep the pigment lies. Epidermal (surface) pigment tends to look more pronounced under the lamp, while dermal (deeper) pigment changes less. This can help predict how well the patches may respond to treatment.
• Dermoscopy. A dermatoscope is a magnifying instrument with a light source that lets the doctor examine pigment patterns closely. It helps distinguish melasma from other pigmented conditions.
• Skin biopsy. A biopsy, in which a tiny sample of skin is removed and examined under a microscope, is rarely needed. Your doctor may suggest it only if the appearance is unusual and other conditions need to be ruled out, such as post-inflammatory hyperpigmentation (darkening after skin injury or inflammation) or, very rarely, an early pigmented skin cancer.

There is no blood test that confirms melasma itself. However, in some cases the doctor may order blood tests to check thyroid function or hormone levels if there is a reason to suspect an underlying contributing condition. No imaging scans, such as X-rays or MRI, are needed to diagnose melasma.

Treatment options for melasma

Melasma treatment aims to lighten the existing patches, prevent new darkening, and reduce the chance of recurrence. It is important to have realistic expectations: melasma is a chronic, relapsing condition, which means it tends to come back, especially with sun exposure or continued hormonal triggers. Treatment often improves the appearance significantly, but complete and permanent clearance cannot be guaranteed. Melasma in hospitals is generally managed by the dermatology department; at Acibadem, for example, dermatologists evaluate pigment disorders such as melasma and plan treatment individually.

Watchful waiting and sun protection

In some situations, particularly melasma that appears during pregnancy, doctors may recommend waiting before starting active treatment. Pregnancy-related melasma often fades on its own within months after delivery, and many treatments are not recommended during pregnancy or breastfeeding. Whatever approach is chosen, strict sun protection is the foundation of all melasma care. This means daily use of a broad-spectrum sunscreen with a high sun protection factor (SPF), reapplied regularly, along with wide-brimmed hats and shade. Sunscreens containing iron oxides may offer added protection against visible light, which can also darken melasma. Without consistent sun protection, other treatments are unlikely to succeed.

Topical medications

Creams applied to the skin are the first-line medical treatment in most cases. Options your doctor may consider include:

• Hydroquinone. A skin-lightening agent that reduces pigment production. It is often considered the standard topical treatment and is typically used for limited periods under medical supervision, because long-term overuse can cause side effects, including a rare paradoxical darkening called ochronosis.
• Triple combination creams. These combine hydroquinone with a retinoid (a vitamin A derivative that speeds skin cell turnover) and a mild corticosteroid (an anti-inflammatory medicine). Combination therapy is often more effective than single agents.
• Other lightening agents. Azelaic acid, kojic acid, tranexamic acid in topical form, vitamin C, and niacinamide are alternatives or additions, particularly for people who cannot use hydroquinone.

Topical treatments usually take several weeks to months to show visible improvement, and patience is essential. Some products can irritate the skin, and irritation itself can worsen pigmentation, so treatment should be guided by a doctor.

Oral medication

For stubborn or recurrent melasma, dermatologists sometimes prescribe oral tranexamic acid, a medication originally used to reduce bleeding, which has been found to lessen pigment production in melasma. It is not suitable for everyone — for example, people with a history of blood clots are generally not candidates — and it requires medical assessment and monitoring.

Procedures

When creams alone are not enough, procedural treatments may be added, usually alongside topical therapy rather than instead of it:

• Chemical peels. A chemical solution, such as glycolic acid, is applied to remove the outer pigmented layers of skin in a controlled way. Superficial peels are preferred, because deeper peels risk irritation and rebound darkening.
• Laser and light-based treatments. Certain lasers can target pigment in the skin. Results vary, and in some people lasers can worsen melasma, particularly in darker skin tones. These treatments require careful selection by an experienced dermatologist and often need maintenance sessions.
• Microneedling. Tiny controlled punctures in the skin, sometimes combined with topical medications, are used in some centers, though evidence is still developing.

Surgery

Surgery has no role in treating melasma. Because the condition involves pigment cells spread across areas of otherwise normal skin, there is nothing to remove surgically, and cutting the skin could cause scarring and further pigmentation.

If a hormonal medication such as a birth control pill appears to be a trigger, your doctor may discuss whether switching to a non-hormonal alternative is appropriate for you. Never stop a prescribed medication without medical advice.

Living with melasma and outlook

Melasma is a benign condition, meaning it poses no danger to your physical health. It does not spread like an infection, and it does not develop into skin cancer. The main burden is cosmetic and emotional, and for some people the visible facial patches cause real distress. If melasma affects your self-esteem or mood, mentioning this to your doctor is worthwhile, as support and treatment options exist.

The long-term outlook varies. Melasma that appears during pregnancy often fades within a year after childbirth, although it does not always disappear completely. Melasma triggered by hormonal medication may improve after the medication is changed, though fading can be slow. Longstanding melasma, especially the dermal or mixed types, tends to be more persistent and may require ongoing maintenance treatment.

Even after successful treatment, recurrence is common. A single day of intense sun exposure can bring patches back. For this reason, most dermatologists frame melasma as a condition to be managed over time rather than cured once. Practical daily habits that help include:

• Applying broad-spectrum sunscreen every morning, all year round, including on cloudy days and indoors near windows
• Reapplying sunscreen every two hours when outdoors
• Wearing a wide-brimmed hat and seeking shade during peak sun hours
• Avoiding tanning beds entirely
• Using gentle skin-care products and avoiding harsh scrubbing or irritating cosmetics, since irritation can worsen pigmentation
• Following your treatment plan consistently, since results build gradually over months

Cosmetic camouflage, such as tinted sunscreens and corrective makeup, can also help many people feel more comfortable while treatment takes effect.

Frequently asked questions

What is melasma and is it dangerous?

Melasma is a harmless pigment condition in which patches of skin, usually on the face, become darker than the surrounding skin. It is not dangerous, not contagious, and not a form of cancer. Its main impact is on appearance, though for some people this can affect confidence and emotional well-being, which is a valid reason to seek care.

Can melasma go away on its own?

In some cases, yes. Melasma that develops during pregnancy often fades within months after delivery, and melasma linked to hormonal medication may improve once the trigger is removed. However, longstanding melasma frequently persists without treatment, and even treated melasma can return with sun exposure. Consistent sun protection improves the chances of lasting improvement.

What is the best treatment for melasma?

There is no single best melasma treatment for everyone. Most doctors start with strict sun protection plus prescription lightening creams, often a combination product containing hydroquinone. Chemical peels, oral tranexamic acid, or carefully selected laser treatments may be added for resistant cases. The right plan depends on your skin tone, the depth of the pigment, pregnancy status, and how you have responded to previous treatments, so an individual assessment by a dermatologist is important.

What causes melasma to flare up?

The most common melasma causes and flare triggers are sun exposure, hormonal changes such as pregnancy or starting hormonal contraception, heat, and skin irritation from harsh products or aggressive treatments. Because triggers add up, many people find their melasma darkens in summer and lightens somewhat in winter. Identifying and limiting your personal triggers is a core part of management.

How is melasma diagnosed?

Melasma diagnosis is usually made by a dermatologist through visual examination of the skin and a discussion of your history, including pregnancies, medications, and sun habits. A Wood’s lamp or dermatoscope may be used to assess the pigment more closely, and a skin biopsy is rarely needed unless the appearance is unusual. No imaging tests are required.

Does melasma come back after treatment?

Recurrence is common, unfortunately. Melasma is considered a chronic, relapsing condition, and patches often darken again after sun exposure or renewed hormonal triggers, even after a good initial response to treatment. Many people use maintenance measures — daily sunscreen and, in some cases, ongoing mild topical treatment as advised by their doctor — to keep the improvement.

Is melasma the same as age spots or freckles?

No. Freckles are small, scattered spots that are usually genetic and sun-related, and age spots (solar lentigines) are discrete round spots caused by long-term sun damage. Melasma forms larger, irregular, symmetrical patches and is strongly linked to hormones as well as sunlight. Because these conditions are treated differently, a professional evaluation helps ensure the correct approach.

When to see a doctor

Melasma itself is not a medical emergency, but any change in skin pigmentation deserves proper evaluation, because other conditions can look similar. Consider seeing a dermatologist if you notice new dark patches on your face, if existing patches are spreading, or if melasma is affecting your confidence and you would like to discuss treatment options. It is especially important to consult a doctor before starting any lightening product during pregnancy or breastfeeding.

Seek medical attention promptly if a pigmented area shows any of the following warning signs, which are not typical of melasma and need assessment to rule out other conditions, including skin cancer:

• A patch or spot that is raised, thickened, or has an uneven, lumpy surface
• Bleeding, crusting, oozing, or a sore that does not heal
• Rapid change in size, shape, or color, especially very dark, black, or multicolored areas
• Itching, pain, tenderness, or burning in a pigmented area
• A single asymmetric spot with irregular borders that looks different from your other patches
• Pigmentation appearing alongside other symptoms such as unexplained fatigue, weight change, or hormonal irregularities, which may point to an underlying condition

A dermatologist can confirm whether your pigmentation is melasma, exclude more serious causes, and design a treatment and prevention plan suited to your skin. Early evaluation gives you the clearest answers and the widest range of safe options.