Pigmentation Treatment Singapore — Melasma, Sun Spots and PIH Explained

Pico or Q-switched laser for pigmentation?

Both are pigment lasers; the difference is pulse duration. A Q-switched laser delivers its energy in nanoseconds, while a picosecond laser delivers it roughly a thousand times faster. The shorter pulse fragments pigment more by a pressure effect than by heat, so less heat spreads into surrounding skin, which matters in Fitzpatrick III to V skin, where heat and inflammation are what trigger post-inflammatory hyperpigmentation.

That does not make one universally right. Wavelength matters as much as pulse length: 532 nm is strongly absorbed by melanin and suits superficial spots, while 1064 nm reaches deeper and is absorbed less by the surface, making it the more conservative choice in darker skin and the usual wavelength for low-energy laser toning. In melasma, either technology is used gently, within a plan built around sun protection and topical therapy, because over-treatment can leave melasma darker than before. The useful question is not which machine but what the pigment is and how deep it sits. Dr Sin Yong's pico laser guide covers the picosecond side in more detail.

Can freckles be removed?

Freckles can be lightened, but not prevented from returning. True freckles, or ephelides, are small, flat, light-brown spots driven by genetics and darkened by sun exposure; they typically fade when sun exposure drops and darken again with it. Because the pigment sits in the upper layer of the skin, they respond to pigment-targeting laser, but the tendency to produce them remains, so new freckles appear with ultraviolet exposure unless sun protection is consistent.

Several other marks are commonly called freckles and behave differently. Solar lentigines are larger, darker sun spots that appear later in life and do not fade in winter. Hori's naevus appears as clusters of grey-brown or bluish spots across the cheeks, sits deeper in the dermis, is common in Asian skin and is frequently mistaken for freckles or melasma; it needs a different wavelength and a longer plan. Melasma forms patches rather than discrete dots. Treating each of these as a freckle is a common reason a laser course disappoints, which is why the marks are examined before any treatment is chosen.

What is cysteamine, and how does it compare with hydroquinone?

Cysteamine is a naturally occurring compound that reduces melanin production, used as a depigmenting cream mainly for melasma. It is typically applied for a short contact period and then washed off, because it can cause warmth, redness and a noticeable odour. Its appeal is that it offers a non-hydroquinone option for people who cannot tolerate hydroquinone or who need longer-term maintenance.

Hydroquinone works by inhibiting tyrosinase, the enzyme melanocytes use to make pigment. It has the longer track record, but it can irritate, and prolonged unsupervised use carries a risk of a rare paradoxical darkening called exogenous ochronosis, which is why it is used under medical supervision and in planned courses. Other options include azelaic acid, which is gentle enough for sensitive skin; tretinoin, which speeds pigment turnover; and topical or oral tranexamic acid, which acts on a different pathway in melasma. These agents are often combined, and the choice depends on the type of pigment, skin sensitivity, pregnancy plans and how long maintenance is likely to last. No topical agent replaces daily sun protection.

What determines the cost of pigmentation removal in Singapore?

Prices are not published on this site, but the factors that determine the cost of pigmentation removal can be set out. The first is the diagnosis: a few sun spots on one cheek and diffuse melasma across both cheeks are very different pieces of work.

The second is the method. Some pigment is managed mainly with topical or oral therapy, some with laser, and many plans combine the two. The area treated, the wavelengths needed and whether a fractional mode is used for texture at the same time all change the plan. The third is time: discrete sun spots may need a short course, while melasma is managed with maintenance rather than a single block of treatment, and that ongoing element is part of the cost discussion. Dr Sin Yong sets out the cost clearly at consultation, once the pigment has been examined and the plan agreed.

What happens during laser pigmentation removal?

Laser pigmentation removal uses light at a wavelength that melanin absorbs, so the pigment is broken into fragments that the skin then sheds or clears, while the surrounding skin is spared as far as the settings allow. It works on the pigment that is already there; it does not switch off what produced it.

On the day, the skin is cleansed, the eyes are protected and numbing cream is applied where the area or setting calls for it. Discrete sun spots and freckles often turn darker and form fine crusts that flake away on their own, whereas low-energy toning for diffuse pigment usually leaves only transient redness.

Not every brown mark should go straight to laser. Sun spots and freckles in the upper skin are the most predictable targets. Post-inflammatory marks respond more slowly and need the inflammation behind them controlled first. Melasma is treated only with conservative settings inside a wider plan, and Hori's naevus needs a deeper-reaching wavelength. A spot that is new, changing or irregular is examined before any cosmetic treatment.

In Fitzpatrick III to V skin, heat is what triggers rebound darkening, so energy is chosen cautiously and daily sun protection continues throughout.

Skin brightening treatment vs whitening: what is realistic?

A skin brightening treatment aims to even out tone and reduce excess pigment so the skin reflects light more uniformly; it does not change your natural skin colour, and no medical treatment should try to. Baseline colour is set by genetics. What can change is the pigment added on top of it: sun spots, freckles, post-inflammatory marks, melasma and the dullness of uneven texture.

In practice, brightening combines steps chosen for the pigment present: daily broad-spectrum sun protection, which matters more than any procedure under Singapore's ultraviolet levels; topical agents that reduce melanin production, such as azelaic acid, or hydroquinone under medical supervision; low-energy laser toning or R2 Glow for diffuse uneven tone; and pigment-targeting laser for discrete spots. Improvement is maintained rather than fixed, because sun exposure, hormones and inflammation keep adding pigment. Aiming for a lighter skin colour, rather than clearer and more even skin, is where people are most often sold products and procedures that carry risk without a medical basis. Assessment names the pigment types present and sets realistic goals for each.

Are skin whitening injections and creams safe?

Injectable whitening drips and unregistered whitening creams are where the risks in this area concentrate. The Health Sciences Authority (HSA) has repeatedly alerted the public to skin-lightening creams found to contain undeclared mercury, as well as cosmetic products found to contain potent undeclared ingredients such as steroids. Mercury can cause rashes, irritation and blotchy skin, and long-term exposure can affect the kidneys and nervous system; hidden steroids can thin the skin and cause acne-like eruptions.

Injections marketed for whitening, usually glutathione and sometimes high-dose vitamin C, are not an established treatment for pigmentation. Evidence for a lasting effect on skin colour is limited, products are sometimes of uncertain origin, and regulators elsewhere, including the Philippine Food and Drug Administration, have warned against injectable glutathione for skin lightening because of reported adverse effects. They are not part of the pigmentation plans described on this page. Products bought online that promise rapid whitening deserve particular caution, and HSA advises anyone who has used a product named in its alerts to stop and see a doctor if they feel unwell. If a product has irritated or darkened your skin, bring it to your assessment so the ingredients can be checked.