Skin Pigmentation: Causes, Types and What Helps

Woman applying serum.

Skin pigmentation — uneven colour, dark patches, or generalised darkening — is one of the most common dermatological concerns in India. Indian skin has higher melanin density than lighter skin tones, which provides sun protection but also makes it more prone to hyperpigmentation from even minor triggers like sun exposure, inflammation, hormonal changes, or injuries.

The Main Types

Melasma: brown or grey-brown patches, typically on the cheeks, forehead, nose bridge, and upper lip. Driven by UV exposure and hormonal changes — extremely common during pregnancy ("mask of pregnancy") and with oral contraceptive use. Affects women disproportionately. Tends to worsen in summer and improve in winter.

Post-inflammatory hyperpigmentation (PIH): flat dark marks left after inflammation — acne, insect bites, burns, cuts, or any skin trauma. Darker skin tones produce more melanin in response to injury and develop PIH more easily. Very common after pimples resolve.

Sun spots (solar lentigines): flat brown spots from cumulative UV damage. More common on the face, hands, and décolletage. Develops gradually over years.

Periorbital hyperpigmentation: dark circles under the eyes — discussed in detail in P5-31.

Acanthosis nigricans: velvety dark thickening at the neck, armpits, and skin folds — associated with insulin resistance, diabetes, and PCOD. Not cosmetic — a metabolic signal.

What Causes It

The common thread: all hyperpigmentation involves excess melanin production by melanocytes. The triggers are:

UV exposure: the most significant and preventable trigger
Hormonal changes: estrogen and progesterone stimulate melanocytes (melasma)
Post-inflammatory response: any skin injury triggers local melanin overproduction
Genetics: darker skin tones are more prone
Medications: certain blood pressure drugs, antibiotics (minocycline), and antimalarials

Treatment

The non-negotiable foundation: daily broad-spectrum sunscreen

No pigmentation treatment works meaningfully without consistent daily sunscreen. Every day, even in winter and when indoors near windows. SPF 30–50. Reapply every 2 hours during outdoor exposure. This prevents further accumulation and allows other treatments to work.

Topical treatments that work:

Vitamin C serum (10–20%): inhibits tyrosinase (the enzyme that produces melanin); antioxidant protection; mild brightening effect with consistent use over 3–6 months
Niacinamide (5–10%): reduces melanin transfer from melanocytes to skin cells; effective and very well-tolerated in Indian skin
Kojic acid (2%): tyrosinase inhibitor from fermented rice; gentle
Arbutin (alpha or beta): melanin inhibitor; gentler than hydroquinone
Retinoids (tretinoin 0.025–0.05%): increase skin cell turnover, gradually shedding pigmented cells; highly effective but requires sunscreen — increases UV sensitivity
Hydroquinone (2–4%): the most potent bleaching agent; prescription in India; effective but requires breaks in use to prevent side effects
Azelaic acid (15–20%): anti-melanin, anti-inflammatory; particularly good for post-acne pigmentation

Professional treatments (dermatology):

Chemical peels (glycolic, mandelic, lactic acid): remove superficial pigmented skin layers; multiple sessions
Laser treatments (Q-switched Nd:YAG, fractional): targeted removal of melanin deposits
Microdermabrasion: mechanical exfoliation for surface pigmentation

For melasma specifically: melasma requires long-term management because it tends to recur. The combination of daily sunscreen + topical treatments (niacinamide + vitamin C + retinoid) + avoiding hormonal triggers (if possible) produces the best results. Professional treatments improve melasma but it often returns without ongoing topical maintenance.

Care at Prakash Hospital Noida

Whether you live in Sector 18, Sector 62, Greater Noida West, or anywhere in the NCR, Prakash Hospital Noida is a trusted name for pigmentation treatment, dermatology, and skin health in Noida.