What Causes Dark Spots and Hyperpigmentation?
Hyperpigmentation — any localised darkening of the skin relative to the surrounding tissue — has one underlying mechanism: excess production or abnormal distribution of melanin, the pigment responsible for skin, hair, and eye colour.
Melanin is produced by melanocytes (pigment-producing cells in the skin's basal layer) in response to various triggers:
The Three Main Types of Hyperpigmentation
1. Post-Inflammatory Hyperpigmentation (PIH) The most common type in Nepal. Follows any inflammatory skin injury: acne, eczema flares, cuts, insect bites, waxing, or chemical irritation. The wound-healing response includes local melanin overproduction in Fitzpatrick Skin Types III–VI (common South Asian skin tones). PIH appears as flat, brown-to-dark marks at the site of healed lesions.
2. Melasma A hormonally-influenced pigmentation disorder appearing as bilateral, symmetric patches on the face — typically the cheeks, upper lip, forehead, and chin. Strongly associated with pregnancy ("mask of pregnancy"), hormonal contraception, and thyroid dysfunction. UV and heat are the primary environmental triggers. More common in darker skin types.
3. Solar Lentigines (Sun Spots) Discrete, well-defined flat spots caused by cumulative UV exposure. More common after age 30 in chronically sun-exposed areas — face, hands, forearms, décolletage.
The Science of Melanin and Why Brightening Takes Time
Melanin synthesis occurs in melanocytes through a chain of enzymatic reactions:
- The amino acid L-tyrosine is converted to DOPA by the enzyme tyrosinase
- DOPA is further converted to dopaquinone
- Dopaquinone undergoes spontaneous oxidation reactions to form melanin (eumelanin for brown/black, pheomelanin for red/yellow)
Melanin is packaged into melanosomes and transferred to surrounding keratinocytes (skin cells), creating visible pigmentation.
Why brightening takes 8–16 weeks: Melanin is embedded in keratinocytes that cycle through the skin over roughly 28 days (longer in older skin). Topical treatments slow NEW melanin production, but existing pigment must physically shed with the natural cell turnover cycle.
This is why:
- Short-term results (under 4 weeks) are mostly superficial brightening, not true depigmentation
- Treatments that only work on the surface (physical exfoliants) do not address active melanogenesis
- Combination therapy targeting multiple steps in melanin synthesis is more effective than single-ingredient approaches
Which Ingredients Actually Work for Dark Spots
Clinically Proven: First-Line Ingredients
Niacinamide (Vitamin B3) Acts by inhibiting the transfer of melanosomes from melanocytes to keratinocytes, reducing visible pigmentation without affecting melanin synthesis itself. Anti-inflammatory, barrier-strengthening, well-tolerated by all skin types. Effective at 4–10% concentration. Available in: Niafine Serum
Tranexamic Acid Inhibits UV-induced activation of plasminogen in keratinocytes, breaking the biochemical pathway that triggers excess melanin production. Particularly effective for melasma. The ingredient in Lumiedge TX Cream.
Arbutin (Alpha-Arbutin) A glycosylated form of hydroquinone that inhibits tyrosinase without the side effects associated with hydroquinone. Effective and well-tolerated.
Kojic Acid A natural fungal metabolite that chelates copper ions required for tyrosinase activity. Effective but can cause irritation in sensitive skin at higher concentrations.
Azelaic Acid Inhibits tyrosinase and has additional anti-inflammatory and anti-bacterial properties. Effective for both PIH and acne-related pigmentation. Well-tolerated in most skin types.
Vitamin C (Ascorbic Acid) An antioxidant that inhibits tyrosinase and reduces oxidised DOPA back to DOPA (interrupting melanin synthesis). Also brightens by neutralising reactive oxygen species that stimulate melanin production. Available in: Agelite Vitamin C Face Wash
The Lumiedge Range — Targeted Pigmentation Treatment in Nepal
Stellar Healthcare offers three Lumiedge products specifically designed for hyperpigmentation:
Lumiedge Cream
A dermatologist-formulated skin brightening cream for post-inflammatory pigmentation and uneven skin tone. Combines multiple depigmenting actives with moisturising agents. For daily use on face. Suitable for moderate PIH and patchy pigmentation.
Lumiedge TX Cream
Specifically formulated for melasma and stubborn hyperpigmentation. Contains tranexamic acid alongside complementary brightening actives. For localised application to melasma patches or persistent dark spots.
Lumiedge Under Eye Cream-Gel
Targets periorbital pigmentation — the dark circles and under-eye discolouration common in South Asian skin types. Contains brightening actives in a light gel-cream texture suitable for the delicate periorbital area.
Lumiedge Skin Brightening Face Mask
A weekly brightening mask that exfoliates superficial pigmented cells while delivering brightening actives. Provides visible brightness boost as a complement to daily brightening cream use.
The Critical Role of Sunscreen in Treating Hyperpigmentation
No brightening treatment works without daily SPF 50.
UV radiation directly triggers melanin synthesis as a photoprotective response. When you apply a brightening treatment and then go outdoors without sunscreen, UV re-triggers the melanin pathway — undoing the treatment and darkening spots further.
Clinical studies consistently show that:
- Brightening treatments combined with SPF 50 show 2–3× better outcomes than brightening treatments alone
- SPF 50 alone, applied consistently for 8 weeks, can visibly fade mild PIH in some patients
- Melasma treated without strict photoprotection almost always recurs
For daily sun protection alongside brightening treatment:
- Oily/combination skin: UVedge SPF 50 Gel
- Sensitive skin: UVedge Soft Mineral SPF-50 Gel
- For added coverage of pigmentation: UVedge Tinted SPF50 Sunscreen
A Simple Brightening Routine for Nepal
Morning
- Gentle cleanser (Moisoft Cleanser or Rensa Face Wash for oily skin)
- Niafine Serum (niacinamide) — allow to absorb
- Lumiedge Cream — apply to dark spots and uneven areas
- UVedge SPF 50 Gel or UVedge Tinted SPF50
Evening
- Gentle cleanser
- Niafine Serum
- Lumiedge Cream or Lumiedge TX Cream for melasma
- Moisturiser
Weekly (1–2×)
Ingredients to Avoid (or Use with Caution)
Hydroquinone (HQ): The historical gold standard for depigmentation, but subject to regulatory caution due to potential ochronosis (paradoxical darkening) with long-term high-dose use and reports of cytotoxicity. Not recommended for self-prescription without dermatologist supervision. The modern brightening alternatives above offer comparable efficacy with better safety profiles.
Unregulated whitening creams: A significant problem in Nepal's market — many over-the-counter "whitening" creams contain undisclosed hydroquinone, corticosteroids, or mercury compounds. These carry risks of skin thinning, steroid acne, irreversible mercury toxicity, and rebound darkening on discontinuation. Always choose products from regulated, GMP-certified manufacturers like Aurelderma.
Lemon juice / DIY citric acid treatments: These are not stable vitamin C. Phototoxic furanocoumarin compounds in citrus cause photochemical burns that produce severe PIH — the opposite of the intended effect.
Summary
Dark spots and hyperpigmentation are among the most common skincare concerns in Nepal, especially in Fitzpatrick Skin Types III–V that are prevalent across South Asia. The evidence-based approach combines:
- Daily SPF 50 — prevents new pigmentation and allows treatment to work
- Niacinamide serum (Niafine) — inhibits melanin transfer, anti-inflammatory
- Targeted brightening cream (Lumiedge) — directly addresses active pigmentation
- Patience and consistency — 8–16 weeks of uninterrupted use
Contact Stellar Healthcare via WhatsApp (+977 9766453795) or visit our products page to find the right Lumiedge formulation for your skin concern.
Related reading: