Why melanin-rich skin is more prone to hyperpigmentation
Melanin-rich skin has more active melanocytes — the cells responsible for producing melanin — and those melanocytes are more reactive to inflammation and UV damage. Any insult to the skin (acne breakout, eczema flare, cut, ingrown hair, overly aggressive exfoliation) triggers a larger melanin response than in lighter skin tones. This is why post-inflammatory hyperpigmentation (PIH) is so common in people with Fitzpatrick skin types IV–VI, and why it often persists long after the original injury has healed.
The three types of hyperpigmentation
Post-Inflammatory Hyperpigmentation (PIH): dark marks left after skin injury or inflammation — the most common type in darker skin tones. Usually epidermal (surface-level) and responds well to topical treatments. Melasma: larger patches of discolouration triggered by hormonal changes (pregnancy, oral contraceptives) and UV exposure. Often involves both epidermal and dermal melanin deposits — harder to treat. Sunspots / Solar Lentigines: discrete flat spots caused by cumulative UV damage. Common on the face, hands, and shoulders after age 30.
Ingredients that work for melanin-rich skin
The most evidence-supported topical brightening ingredients, ranked by tolerability for sensitive melanin-rich skin: 1) Tranexamic acid 2–5%: gentle, effective for melasma and PIH, low irritation risk. 2) Alpha arbutin 1–2%: stable, well-tolerated brightener; works similarly to kojic acid but gentler. 3) Niacinamide 5–10%: reduces melanin transfer to skin cells, also improves barrier function. 4) Kojic acid 1–2%: effective but can irritate sensitive skin; introduce slowly. 5) Vitamin C (ascorbic acid) 10–20%: antioxidant + brightening; pairs well with SPF. 6) Azelaic acid 10–20%: anti-inflammatory + tyrosinase inhibitor; excellent for PIH with active acne.
What to avoid
Avoid high-concentration lemon juice, lime juice, or raw turmeric directly on skin — these can cause phototoxic reactions and worsen pigmentation. Avoid over-exfoliation with high-percentage AHA/BHA products: irritation is the enemy of hyperpigmentation treatment. Avoid physical scrubs with harsh particles that cause micro-tears. Hydroquinone above 2% (prescription strength) should only be used under dermatologist supervision — while effective, it requires cycling to avoid paradoxical darkening (ochronosis) with prolonged use.
The correct routine order for hyperpigmentation
Morning: 1) Gentle cleanser. 2) Vitamin C serum or niacinamide serum. 3) Moisturiser with ceramides. 4) SPF 30 or higher — mandatory, every single day. Evening: 1) Double cleanse if wearing SPF or makeup. 2) Exfoliating toner (AHA/BHA) 2–3 nights per week. 3) Brightening active (tranexamic acid, alpha arbutin, or kojic acid). 4) Moisturiser. 5) Retinol or bakuchiol 1–2 nights per week (separate nights from strong exfoliation). SPF is not optional — sun exposure negates all brightening treatments. Melanin-rich skin is not immune to UV damage; it simply has slightly more natural protection than lighter skin (approximately SPF 13 equivalent).