What Is Hyperpigmentation?
Hyperpigmentation is the overproduction of melanin — the pigment responsible for skin colour — resulting in patches, spots, or areas of skin that appear darker than the surrounding tissue. It is caused by the hyperactivation of melanocytes (melanin-producing cells in the epidermis) and the subsequent transfer of excess melanin granules to surrounding keratinocytes. Hyperpigmentation is one of the most common skin concerns globally and affects all Fitzpatrick skin types, though it is more visible and more persistent in deeper skin tones.
Types of Hyperpigmentation
Post-inflammatory hyperpigmentation (PIH) follows skin injury or inflammation — acne, eczema, cuts — triggering melanocyte hyperactivation during healing. Melasma is hormonally driven (pregnancy, contraceptives, sun exposure) and typically affects the cheeks, forehead, and upper lip symmetrically. Solar lentigines (age spots, liver spots) are discrete UV-induced patches that accumulate over decades. Freckles (ephelides) are genetic and UV-amplified.
Effective Treatments
Daily SPF is non-negotiable — UV exposure perpetuates every form of hyperpigmentation. Tyrosinase inhibitors (niacinamide, alpha-arbutin, kojic acid, tranexamic acid) reduce melanin synthesis. Retinoids accelerate cell turnover, shedding pigmented cells faster. Chemical exfoliation (AHAs) similarly expedites turnover. Prescription hydroquinone remains the most potent topical option but requires medical supervision.
Timeline reality: Hyperpigmentation treatment is measured in months, not weeks. PIH can take 3–6 months of consistent treatment. Melasma is particularly stubborn and often requires combination therapy plus strict sun avoidance.