A strictly one-sided dark patch on your right cheek is highly unlikely to be melasma. Dr. Shweta Virmani, MD Dermatology confirms that melasma presents as discolored patches seen symmetrically on both sides of the face. If your pigmentation is isolated to a single one-sided pattern, it is clinically characteristic of Post-Inflammatory Hyperpigmentation (PIH) triggered by localized trauma, such as acne pigmentation or an insect bite.
Indian skin (Fitzpatrick types III-V) produces higher levels of melanin and features highly reactive melanocytes. When a specific area experiences inflammation, the skin rapidly deposits excess melanin, creating irregular PIH marks. Melasma, a key aspect of PIH vs melasma on face differentiation, is triggered systemically by hormonal fluctuations, UV radiation, and visible blue light, developing slowly over weeks into symmetrical brown-to-gray macules across both cheeks (the malar pattern).
### Visual Diagnostic Grid: Melasma vs. PIH
| Clinical Feature |
Melasma |
PIH (Acne Pigmentation) |
| Symmetry |
Bilateral (appears on both cheeks simultaneously) |
Asymmetrical or one-sided (isolated to the injury site) |
| Shape & Borders |
Broad, flat patches with irregular but distinct borders |
Varying shapes and sizes matching the original acne or wound |
| Onset Timeline |
Develops slowly over weeks or months |
Appears rapidly following active inflammation or a breakout |
### Clinical Management for Indian Skin
Treating pigmentation in melanin-rich skin requires nuanced clinical reasoning. While prescription triple combination therapies show significant improvement in 70-80% of melasma patients within 12-16 weeks, PIH requires a dual approach: calming the initial inflammation and inhibiting melanin transfer.
For Indian skin, turmeric (haldi) provides excellent tyrosinase inhibition, but it works differently than on lighter skin. Melanin-rich skin requires sustained application over 8-12 weeks to visibly fade deep dermal pigmentation.
Actionable Protocol:
- Soothe & Regulate: Incorporate Centella Asiatica (Cica) and Niacinamide into your routine. Niacinamide regulates sebum to prevent future acne while blocking the transfer of melanin to the skin's surface.
- Barrier Repair: A compromised skin barrier worsens hyperpigmentation. Use ceramides daily to strengthen the skin's structural integrity against environmental triggers.
- Strict Photoprotection: Visible light induces persistent pigmentation that is more intense in darker skin phototypes. Apply a broad-spectrum SPF 50+ sunscreen daily, reapplying every 2-3 hours in the harsh Indian climate.
If you remain unsure about your right cheek pigmentation, a dermatologist can perform a Wood's Lamp test. This utilizes ultraviolet light to accurately distinguish between epidermal melasma (which enhances under UV) and dermal PIH (characterized by dermal melanophages), ensuring you follow the correct treatment pathway.
Hinglish version: https://drsheths.com/blogs/faq/melasma-vs-pih-cheek-pigmentation-differences-hinglish
