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Hyperpigmentation
Uneven skin tone often has a story. Sun, hormones, or a breakout that healed with a mark. Understanding your type of hyperpigmentation is the first step to caring for it with confidence.
What is hyperpigmentation
Hyperpigmentation begins with a cellular switch. Inside your skin, specialized cells called melanocytes produce pigment (melanin), and this entire process is controlled by an enzyme called tyrosinase that acts as the biological "ON" switch. When environmental or physiological triggers flip this switch, your cells overproduce pigment. This excess melanin travels to the surface, creating dark spots and uneven skin tone.
The main triggers include
A sun spot, an acne mark, and melasma may look similar, but they are not triggered by the same mechanisms. That's why each treatment plan should be personalized based on the type and cause of hyperpigmentation, as well as your skin's unique characteristics.
What causes hyperpigmentation
Pigmentation is rarely accidental. It reflects what your skin has lived through, and the causes below often act together.
UV and visible light exposure
Ultraviolet rays are the most common trigger. UV signals melanocytes to produce more melanin as a protective response. Visible light, including the wavelengths from screens and daylight through windows, can also stimulate pigment, especially on medium to dark skin tones. Even short daily exposures add up over time. This "pigment memory" is why summer often deepens existing spots and why prevention matters year-round.
Skin inflammation and injury
When the skin heals from an inflammatory event (an acne breakout, a scratch), melanocytes can release excess pigment during the repair process. This is called post-inflammatory hyperpigmentation, or PIH. It is more common and often longer-lasting on medium to dark skin tones, where the pigment response tends to be stronger.
Hormonal shifts
Hormones directly influence melanocyte activity. During pregnancy, the rise in estrogen and progesterone can trigger a specific pattern of facial pigmentation known as chloasma or the pregnancy mask. Hormonal contraception, hormone therapy, and the hormonal shifts of perimenopause and menopause can also awaken or worsen pigmentation. Melasma, in particular, is closely tied to hormones combined with sun exposure. Some marks fade after the hormonal trigger settles, but many need active care to improve.
Photosensitizing medications
Some medications increase how the skin reacts to light and can contribute to pigmentation. If you notice new pigmentation after starting a treatment, mention it during your medical consultation so the trigger can be assessed.
Genetics and phototype
Skin naturally comes with different amounts of active melanin, described on the Fitzpatrick scale from very light to very dark. Deeper phototypes have more baseline melanocyte activity, which offers stronger protection against UV damage but also a higher tendency toward pigmentation after triggers. Freckles are a genetically driven form of pigmentation, especially common in lighter phototypes.
Less common medical conditions
A small number of pigmentation changes are linked to conditions that go beyond the usual triggers. Examples include tinea versicolor (a superficial yeast that alters pigment), acanthosis nigricans (velvety dark patches often associated with metabolic factors), progressive pigmentary purpura (small pigment deposits from fragile capillaries), and rare autoimmune disorders.
If your pigmentation appears suddenly, changes in shape or texture, or does not fit the usual patterns, consult a physician or healthcare professional for further assessment.
The types of hyperpigmentation
Melasma
Melasma appears as symmetrical brown or grey-brown patches, usually on the cheeks, forehead, upper lip, or bridge of the nose. It is strongly linked to hormonal shifts (pregnancy, contraception, hormone therapy) and worsens with sun and heat. Melasma tends to be chronic and needs consistent care, but it responds well to a combination of daily sun protection, targeted topicals, and in-clinic treatments chosen carefully to avoid excess heat. Even with successful treatment, melasma has a high recurrence rate, which is why strict daily sun protection remains essential.
Post-inflammatory hyperpigmentation
Post-inflammatory hyperpigmentation, or PIH, is the dark mark left after the skin has calmed down from a breakout, an injury, or a procedure. It is more common on medium to dark skin tones. PIH often fades on its own with time, but daily sun protection and targeted topicals speed up the process, and in-clinic treatments can help stubborn marks.
Solar lentigines
Solar lentigines, also known as age spots or sun spots, are flat brown spots that appear on areas exposed to the sun over years: the backs of the hands, the décolleté, the face. They reflect cumulative UV exposure rather than active inflammation. Pigment lasers and chemical peels are well suited to lightening them, alongside daily sun protection.
Freckles
Freckles, or ephelides, are small tan or brown spots that intensify with sun exposure and fade in winter, most common on lighter skin tones. They are generally benign and part of your skin's genetic signature. If you notice a spot that behaves differently from your usual freckles (irregular border, growth, change in colour), have it assessed medically to distinguish it from a solar lentigine or another lesion.
At-home care and hyperpigmentation prevention
Managing hyperpigmentation goes beyond in-clinic treatments. Daily sun protection and a targeted skincare routine play an important role in limiting the factors that stimulate melanin production, preventing new dark spots, and supporting the results of your treatments.
In-clinic treatments
Chemical peels
Chemical peels use exfoliating acids to gently remove the outer layer of the skin in a controlled way. Fresher skin comes to the surface and pigment cells reset. Superficial peels suit melasma, PIH, and age spots well. They are usually done in a series, spaced weeks apart. Expected reactions include mild redness, light peeling for a few days, and short-term sensitivity to the sun. Rare risks include irritation, temporary pigmentation changes, and, on darker phototypes, a slight risk of PIH itself, which is why the depth is always tailored to your skin. Peels are not recommended during pregnancy or on active eczema in the treatment area. Our medical team decides the right depth for your skin.
Lasers
Pigment lasers deliver very brief bursts of light that shatter pigment particles without heating the surrounding tissue. Q-switched and picosecond lasers, including PicoSure, are chosen for their precision on pigment. Fractional lasers can also help resurface older marks. Because heat can worsen melasma, technology and settings are carefully adapted to each skin type; picosecond wavelengths are usually preferred on medium to dark phototypes to reduce the risk of paradoxical pigmentation. Expected reactions include redness, small dark flakes for a few days, and short-term sun sensitivity. Rare risks include temporary lightening, blistering, and post-inflammatory hyperpigmentation, especially without strict sun protection after the session. Lasers are not recommended during pregnancy, on recently tanned skin, or on active infections in the treatment area. Our medical team chooses the laser and the settings suited to your skin.
Microneedling
Microneedling uses very fine needles to create controlled micro-channels in the skin. The skin rebuilds collagen during the healing response, and the channels also improve absorption of brightening serums applied during or after the session. This makes microneedling particularly useful for post-inflammatory hyperpigmentation and pigmented acne scars. Expected reactions include redness and small pinpoint marks for 24 to 48 hours. Rare risks include infection if aftercare is not followed and, on reactive skin, transient pigment changes. Microneedling is not recommended on active acne outbreaks or open lesions in the treated area. Our medical team sets the depth and frequency suited to your skin.
A medical team that knows your skin
Every type of hyperpigmentation has its own story and its own care plan. Book a consultation to understand yours and shape the right combination for you.