MD Dermatology · 25+ yrs international practice
Dermatologist's quick take
- Hyperpigmentation has 4 distinct causes — each needs a different approach
- Sun exposure makes every type of pigmentation darker and more persistent
- The proven ingredients: vitamin C, niacinamide, retinoids, tyrosinase inhibitors
- Expect 8–12 weeks for visible results; 6 months for full fade
- Skin of colour needs gentler protocols — over-aggressive treatment causes more pigment
Hyperpigmentation is a single word for at least four different problems. Treating them all the same way is why most patients spend months on the wrong protocol. I'm Dr. Urhekar, and across 25 years of practice across Africa, the Middle East and Asia, I've watched hyperpigmentation become one of the most undertreated yet very tractable conditions in dermatology — provided you identify the type first.
Throughout I'll link the rest of the Ask a Dermatologist series. The ScanSkinAI free AI skin analysis can help differentiate melasma, post-inflammatory hyperpigmentation (PIH), and sun-induced lentigines — step one of any treatment plan.
The four causes
Sun damage (lentigines)
Sharply-bordered brown spots on sun-exposed areas. Years of UV exposure. Common in Fitzpatrick I–IV.
Post-inflammatory (PIH)
Follows acne, eczema, injury. Diffuse, soft-edged. Most common type in Fitzpatrick IV–VI.
Melasma
Symmetric patches on cheeks, forehead, upper lip. Hormonal (pregnancy, OCP) plus UV plus heat trigger.
Drug- or heat-induced
Minocycline, hydroxychloroquine, certain chemo agents; also heat from cooking or sauna (poikiloderma).
The four ingredients that actually work
1. Tyrosinase inhibitors (the heavy hitters)
Hydroquinone 2–4% remains the gold standard, used in cycles. Newer alternatives include tranexamic acid (oral or topical, particularly good for melasma), cysteamine (rising star — gentle, effective), and azelaic acid 15–20%(excellent for PIH and sensitive skin).
2. Vitamin C (10–20%)
L-ascorbic acid is the most studied antioxidant for skin. It interrupts melanin synthesis at multiple points and brightens the overall complexion. Pair with sunscreen — vitamin C without SPF is wasted.
3. Retinoids (the long-game)
Retinaldehyde, adapalene 0.1% or prescription tretinoin 0.025–0.1% accelerate skin turnover, pushing pigmented cells to the surface faster. Build slowly to nightly use over 8–12 weeks.
4. Niacinamide (5–10%)
Niacinamide blocks melanosome transfer from melanocytes to keratinocytes. Excellent in skin of colour because it's gentle and barrier-supportive. Pairs well with everything.
A pigmentation routine that works
- AM: Vitamin C 10–15% → niacinamide → moisturiser → SPF 50
- PM: Cleanse → tyrosinase inhibitor (azelaic, cysteamine, or HQ if prescribed) → retinoid → moisturiser
- Apply SPF every 2 hours of sun exposure — pigmentation responds to UVA at 380 nm
- Add antioxidant boost (resveratrol, ferulic acid) in summer months
- Track with photos every 4 weeks — visible change is gradual but real
Skin of colour: the rules are different
Aggressive treatment causes more pigmentation in Fitzpatrick IV–VI — paradoxically. Avoid: glycolic peels above 30%, IPL devices, harsh scrubs. Choose: azelaic, cysteamine, low-strength tretinoin, polyhydroxy acids. Read the dedicated skincare for dark skin tones guide for full protocols.
What makes pigmentation worse
- Skipping daily SPF — UVA goes through windows and cloud cover
- Hot showers, saunas, infrared (heat triggers melasma directly)
- Aggressive scrubs and physical exfoliants
- Picking at spots — every micro-injury triggers PIH
- "Skin lightening" creams from unregulated markets — many contain mercury or unsafe corticosteroids
When to see a dermatologist
If 12 weeks of an OTC routine has not budged the pigmentation, escalate. A dermatologist can prescribe Kligman's formula (HQ + tretinoin + steroid), tranexamic acid, or evaluate whether laser/IPL is appropriate — usually only for sun damage in Fitzpatrick I–III.
How ScanSkinAI helps
Use ScanSkinAI for monthly photo tracking. Pigmentation changes are notoriously hard to perceive day-to-day — the AI overlay shows objective change. Start with a free AI skin analysis.
Identify your pigmentation type in 60 seconds
Free AI skin check distinguishes melasma, PIH, lentigos, and freckles.
Frequently Asked Questions
Hyperpigmentation is an umbrella term for any darkening. Melasma is a specific subtype — symmetrical, hormone-driven patches usually on the upper cheeks, forehead, and upper lip. Melasma needs a gentler, longer protocol than post-inflammatory hyperpigmentation.
Yes, hydroquinone 2–4% is still the gold standard for stubborn pigmentation. But it must be cycled (3 months on, 1–2 months off) to avoid ochronosis (paradoxical darkening) — especially in Fitzpatrick IV–VI skin. Use under medical supervision.
Yes. The old myth that they 'cancel each other out' has been debunked. Many dermatologist-formulated serums combine both. Apply vitamin C first (on dry skin), wait 60 seconds, then niacinamide.
Eight to twelve weeks for visible improvement. Three to six months for substantial fade. Pigmentation that took 5 years to develop will not disappear in 5 weeks — patience is half the protocol.
For sun damage in fair skin, yes. For melasma or PIH in skin of colour, lasers are risky and often worsen the pigmentation. Topical first, laser only as a last resort with a dermatologist trained in skin of colour.
Because UVA passes through windows year-round and you're under-using SPF in winter. Daily SPF 50, even indoors near windows, prevents 90% of pigmentation recurrence.
Dr. Anand S. Urhekar
VerifiedMD Dermatology · 25+ yrs · Section Head, M.P. Shah Hospital Nairobi · Former UN Dermatologist
Dr. Urhekar is a board-certified dermatologist with over 25 years of practice across Africa, the Middle East and Asia. As Section Head of Dermatology at M.P. Shah Hospital Nairobi and a former UN dermatologist, he specialises in tropical skin disease, Fitzpatrick IV–VI skin care and global health.