Pigmentation Treatment in Singapore

What is Pigmentation (Hyperpigmentation)?

Pigmentation, more accurately referred to as hyperpigmentation, is a common skin condition in which areas of the skin become darker than the surrounding skin due to increased melanin, the natural pigment responsible for skin colour.

What Does Pigmentation Look Like?

Hyperpigmentation usually appears as flat, darker spots or patches rather than raised or bumpy growths. It may range from small, well-defined spots to larger, irregular or blotchy patches. Pigmentation can also coexist with raised pigmented growths such as seborrhoeic keratoses.

What Colour Is Pigmentation?

The colour depends on the type and depth of pigment. It may appear light brown, dark brown, grey-brown or grey, with deeper pigmentation often appearing greyer.

How Large Can Pigmentation Be?

Pigmentation varies considerably in size. Freckles may measure only a few millimetres, while melasma can form larger irregular patches extending several centimetres across the face.

Where Does Pigmentation Commonly Appear?

Hyperpigmentation commonly affects sun-exposed areas, particularly the cheeks, forehead, nose, upper lip, neck, upper chest, forearms and backs of the hands. However, it can occur anywhere, particularly following inflammation or injury to the skin.

Is Pigmentation Harmful?

Most common forms of hyperpigmentation, including freckles, melasma and post-inflammatory hyperpigmentation, are benign and usually cause no pain or itching. However, they can be cosmetically bothersome.

Importantly, not every brown or dark spot is harmless pigmentation. A new or changing pigmented lesion should be assessed by a dermatologist to establish the correct diagnosis and exclude skin cancer before cosmetic or laser treatment.

What are the Symptoms of Skin Pigmentation

Hyperpigmentation is mainly recognised by changes in the colour and pattern of the skin rather than physical symptoms. Its appearance varies depending on the underlying cause.

• Darker patches or spots: Hyperpigmentation usually appears as flat areas that are darker than the surrounding skin. They may be light brown, dark brown or grey, depending on the type and depth of pigment.
• Usually no physical symptoms: The pigmented areas themselves are generally not painful, itchy, tender or uncomfortable. If there is persistent itching, burning, pain or redness, there may be an underlying inflammatory or other skin condition that should be assessed.
• Normal skin texture: In most forms of hyperpigmentation, the skin remains smooth and flat. A pigmented area that becomes raised, rough, scaly, crusted or ulcerated may represent a different type of skin lesion and should be examined by a dermatologist.
• Characteristic patterns: The distribution of pigmentation can provide important clues to its cause. Melasma typically causes symmetrical patches on the face, particularly over the cheeks, forehead and upper lip. Sun spots (solar lentigines) usually appear as discrete brown spots on chronically sun-exposed areas. Post-inflammatory hyperpigmentation (PIH) develops at sites of previous inflammation or injury, such as after acne, eczema, a rash or a skin procedure.

What Causes Skin Pigmentation?

Skin pigmentation develops when melanocytes—the cells responsible for producing pigment—produce excess melanin. This pigment can accumulate unevenly within the upper or deeper layers of the skin, resulting in areas that appear darker than the surrounding skin.

Several factors can trigger or worsen excess pigmentation:

• Sun Exposure: Ultraviolet (UV) radiation stimulates melanin production and is one of the most important causes of pigmentation. It can darken existing pigmentation and contribute to freckles, sun spots and melasma.
• Hormonal Changes: Changes in hormones, particularly during pregnancy or with hormonal medications, can stimulate pigment production and contribute to melasma.
• Inflammation: Acne, eczema and other inflammatory skin conditions can leave behind post-inflammatory hyperpigmentation (PIH) after the inflammation settles. This is particularly common in individuals with darker skin types.
• Skin Injury or Procedures: Cuts, burns, scratching and sometimes skin procedures can trigger increased pigment production as the skin heals, particularly in people who are prone to PIH.
• Genetics: Genetic factors influence skin colour and an individual's tendency to develop conditions such as freckles and melasma.
• Medications and Medical Conditions: Certain medications and, less commonly, underlying medical conditions can cause or contribute to changes in skin pigmentation.
• Visible Light: In addition to UV radiation, visible light can worsen melasma and hyperpigmentation, particularly in darker skin types. This is one reason tinted sunscreens containing iron oxides may be useful for patients with persistent melasma.

Often, more than one factor is involved. For example, melasma may result from a combination of genetic susceptibility, hormonal influences and light exposure. Identifying the type and cause of pigmentation is important because different forms of pigmentation respond to different treatments.

Who Can Develop Skin Pigmentation?

Anyone can develop pigmentation, but pigmentation concerns are particularly common in Asian skin. People with medium to darker skin tones also tend to develop more noticeable and persistent pigmentation following inflammation or skin injury.

Several factors can increase the likelihood of developing hyperpigmentation:

• Frequent Sun Exposure: People who spend significant time outdoors or have accumulated years of sun exposure are more likely to develop freckles, sun spots and uneven pigmentation.
• Living in a Tropical Climate: In Singapore, high levels of UV radiation throughout the year can contribute to the development and recurrence of pigmentation.
• Women and Hormonal Changes: Melasma is particularly common in women and may develop or worsen during pregnancy, with oral contraceptive pills or other hormonal influences.
• Darker Skin Types: Asian and darker skin types are more prone to post-inflammatory hyperpigmentation (PIH) following acne, eczema, rashes, injuries or certain skin procedures.
• People Prone to Skin Inflammation: Recurrent acne, eczema and other inflammatory skin conditions can leave persistent brown or grey marks after the original condition has resolved.
• Genetic Predisposition: Some pigmentation conditions have a genetic component, and a family history of conditions such as melasma or freckles may increase susceptibility.

Pigmentation at Different Stages of Life

Different pigmentation conditions also tend to appear at different ages:

• At Birth or Early Childhood: Pigmented birthmarks such as café-au-lait macules and naevus of Ota may be present from birth or become apparent during childhood.
• Childhood and Adolescence: Freckles often become more noticeable with sun exposure, while conditions such as Becker's naevus commonly appear around adolescence.
• Adulthood and Middle Age: Melasma, solar lentigines (sun spots) and Hori's naevus become increasingly common during adulthood.

Because different pigmentation conditions can look similar but require different approaches to treatment, an accurate diagnosis is important. Our dermatologist will assess the type, depth and likely cause of the pigmentation before recommending treatment.

This is particularly important with melasma, where overly aggressive laser treatment can sometimes trigger inflammation, post-inflammatory hyperpigmentation or worsening of the condition. Treatment therefore needs to be carefully tailored to the individual patient's skin type and pigmentation pattern.

What are The Different Types of Pigmentation?

Skin pigmentation can be broadly categorised according to where the excess pigment lies within the skin. Pigment may be located superficially in the epidermis, deeper within the dermis, or at both levels.

The depth of pigmentation is important because it influences which treatments are appropriate, how easily the pigmentation can be treated and how many treatment sessions may be required.

1. Freckles (Ephelides)

Freckles are small, flat, light-to-medium brown spots that usually develop on sun-exposed areas such as the face. They often become darker or more noticeable following sun exposure.

The pigment is predominantly superficial (epidermal). As a result, freckles generally respond well to appropriately selected pigment lasers, although they can recur with continued sun exposure.

2. Sun Spots (Solar Lentigines)

Solar lentigines are well-defined brown spots that develop as a result of cumulative sun exposure. They are particularly common on the face, backs of the hands and other chronically sun-exposed areas.

The pigment is usually epidermal, making solar lentigines suitable for treatment with targeted pigment lasers. Sun protection remains important because new sun spots can continue to develop over time.

3. Melasma

Melasma causes irregular, blotchy and usually symmetrical brown or grey-brown patches, most commonly affecting the cheeks, forehead, nose and upper lip.

Unlike simple sun spots, melasma is a complex and recurrent pigmentary condition. Pigmentation may be epidermal, dermal or mixed, and factors such as genetics, hormones, UV exposure and visible light contribute to the condition.

Treatment therefore often requires a combination of sun protection, lightening creams, oral medications in selected patients, gentle chemical peels and carefully selected energy-based treatments, which may include laser or microneedling radiofrequency.

Importantly, aggressive laser treatment can sometimes worsen melasma, so treatment needs to be carefully tailored.

4. Post-Inflammatory Hyperpigmentation (PIH)

PIH appears as flat brown, grey or dark marks following inflammation or injury to the skin, such as acne, eczema, burns, insect bites or skin procedures. It is particularly common and can be more persistent in Asian and darker skin types.

Pigment may be located in the epidermis, dermis or both. Superficial PIH often gradually fades and can respond well to sun protection and topical lightening treatments. Persistent cases may benefit from chemical peels or picosecond laser treatment.

5. Hori's Naevus (ABNOM)

Hori's naevus, also known as Acquired Bilateral Naevus of Ota-like Macules (ABNOM), is particularly common in Asian women. It typically appears as multiple symmetrical blue-grey, grey-brown or slate-coloured spots over the cheekbones, although other areas of the face may be involved.

Unlike freckles and sun spots, the pigment is located deep within the dermis. Treatment therefore generally requires multiple sessions of an appropriate pigment laser, such as Q-switched or picosecond laser.

Because the pigment is deeper and Asian skin is susceptible to post-inflammatory hyperpigmentation, treatment is usually performed gradually over several sessions.

What are the Effective Treatments for Skin Pigmentation?

The most appropriate treatment depends on the type, depth and cause of the pigmentation, as well as the patient's skin type. Conditions such as freckles, sun spots, melasma, Hori's naevus and post-inflammatory hyperpigmentation behave differently and may require different treatments.

Treatment may include sun protection, medical-grade lightening creams, oral medications, pigment lasers or a combination of treatments.

1. Sun Protection

Daily sun protection is the foundation of any pigmentation treatment plan. Ultraviolet (UV) radiation stimulates melanin production, which can darken existing pigmentation and contribute to the formation of new spots.

We generally recommend a broad-spectrum SPF 50+ sunscreen with high UVA protection. For conditions such as melasma, tinted sunscreens containing iron oxides can provide additional protection against visible light, which may also contribute to pigmentation.

Other useful measures include wide-brimmed hats, sunglasses, UV-protective clothing and seeking shade during periods of intense sunlight.

Some patients may also benefit from oral photoprotective supplements containing Polypodium leucotomos extract. These should be used in addition to, rather than instead of, sunscreen.

2. Medical-Grade Lightening Creams

Topical treatments can gradually lighten pigmentation and even out skin tone. Depending on the type of pigmentation, ingredients may include:

• Hydroquinone
• Tretinoin and other retinoids
• Azelaic acid
• Cysteamine
• Tranexamic acid
• Kojic acid
• Arbutin

These ingredients work in different ways to reduce melanin production and promote the turnover of pigmented skin cells.

For melasma, prescription combination treatments containing hydroquinone, tretinoin and a mild corticosteroid may also be used.

Treatment should be carefully selected, as excessive irritation can itself trigger post-inflammatory hyperpigmentation, particularly in Asian and darker skin types.

3. Oral Medications

For selected patients with persistent melasma, oral tranexamic acid may be considered alongside topical treatments and sun protection.

Oral tranexamic acid can help reduce the pathways that stimulate excess pigmentation in melasma. However, it is not suitable for everyone, particularly patients with an increased risk of blood clots. A medical assessment is therefore required before treatment.

4. Pigment Lasers

Pigment lasers use specific wavelengths of light to target excess melanin in the skin, breaking up the pigment so that it can gradually be cleared by the body.

Different lasers are suited to different types and depths of pigmentation. We use a range of pigment laser technologies, including:

• Picosecond lasers (532 nm and 1064 nm): Can treat both superficial and deeper pigmentation and are commonly used for freckles, sun spots and Hori's naevus.
• 755 nm Alexandrite laser: Particularly useful for treating selected brown pigmentation such as freckles and sun spots.

Treatment can be adjusted according to the patient's preferred downtime. Gentler treatments provide gradual lightening with little or no downtime but usually require several sessions. More aggressive treatments targeting pigmented areas may produce quicker clearance, although the pigment may temporarily darken or form a light crust before fading.

Laser treatment needs to be used more cautiously for melasma and post-inflammatory hyperpigmentation, as excessive treatment can sometimes make these conditions darker.

5. Combination Treatments

Pigmentation often occurs together with other concerns such as uneven skin texture, enlarged pores, acne scars or signs of sun damage. Combining treatments can therefore be useful when patients would like to address several concerns.

Depending on the individual's skin, options may include:

• Picosecond laser + fractional CO₂ laser for pigmentation together with uneven texture, pores or acne scars.
• 755 nm Alexandrite laser + picosecond laser to target different types and depths of pigmentation.
• Pigment laser + radiofrequency microneedling when pigmentation occurs together with enlarged pores, acne scars or skin laxity.

The treatments may be performed together or separately depending on the patient's skin type, concerns and desired recovery time.

6. Choosing the Right Pigmentation Treatment

There is no single treatment that works best for every type of pigmentation. Freckles and sun spots may respond relatively quickly to targeted laser treatment, while deeper pigmentation such as Hori's naevus generally requires several sessions.

Melasma is more complex and has a tendency to recur, so it often requires a combination of sun protection, lightening creams and, in selected patients, oral medication and carefully chosen procedures.

Our dermatologist will first assess the type and depth of pigmentation and the patient's skin type before recommending a personalised treatment plan.

Why Choose Us for Laser and Pigmentation Treatments?

Effective laser and pigmentation treatment begins with an accurate diagnosis and a clear understanding of how different pigmentation conditions and skin types respond to treatment. Our dermatologist's experience allows each treatment to be carefully tailored, with the aim of achieving consistent and predictable improvement while minimising unnecessary downtime and side effects.

Dr. Stephanie Ho's Expertise in Laser and Pigmentation Treatments

Dr. Stephanie Ho is highly experienced in managing skin pigmentation, tattoos, and laser-based skin rejuvenation. She collaborates with leading dermatologists in Hong Kong and Singapore and has contributed extensively to scientific research.

Dr. Ho's research contributions to the treatment of pigmentation include:

• Ho SG, Chan HH. The Asian dermatologic patient: review of common pigmentary disorders and cutaneous diseases. American Journal of Clinical Dermatology 2009; 10(3): 153–68.
• Chan NP, Ho SG, Shek SY, Yeung CK, Chan HH. Facial depigmentation with low-fluence Q-switched Nd:YAG lasers for skin rejuvenation and melasma. Lasers Surg Med 2010 Oct; 42(8): 712–9.
• Ho SG, Yeung CK, Chan NP, et al. Management of freckles and lentigines using four different pigment lasers on Asian skin. J Cosmet Laser Ther 2012; 14(2): 74–80.
• Ho SG, Yeung CK, Chan NP, et al. 1927 nm fractional thulium fiber laser for melasma management in Chinese patients. J Cosmet Laser Ther 2013; 15(4): 200–6.
• Goh CL, Ho SG. Laser tattoo removal: A clinical update. J Cutaneous Aesthetic Surgery 2015; 8(1): 9–15.

Summary

Pigmentation (hyperpigmentation) is a common skin concern caused by excess melanin in the skin. It includes conditions ranging from superficial freckles and sun spots to deeper or more complex pigmentation such as melasma and Hori's naevus.

Successful treatment starts with an accurate diagnosis of the type and depth of pigmentation. This allows treatment to be tailored to the individual and may include sun protection, medical-grade skincare, oral medications and laser treatment where appropriate.

Our clinic uses established picosecond, nanosecond and long-pulsed laser technologies at different wavelengths to target different types and depths of pigmentation. These treatments may be combined with skincare and other therapies to achieve gradual improvement in pigmentation and a clearer, more even skin tone, while minimising the risk of irritation and post-inflammatory pigmentation.

If you are concerned about pigmentation or would like to explore treatment options, book an appointment with our dermatologist for an assessment and personalised treatment plan.