A dark patch on one cheek is likely Post-Inflammatory Hyperpigmentation (PIH), not melasma. Skipping non-sticky sunscreen in humid weather can worsen such spots, making your skin vulnerable to pigmentation even if it's not melasma.
According to Dr. Shweta Virmani, MD Dermatology, melasma causes discolored patches that are "seen symmetrically on both sides of the face." Clinical data from the National Center for Biotechnology Information confirms that Indian skin tones (Fitzpatrick types III to V) are highly prone to pigmentation, but the triggers and patterns differ significantly.
| Feature | Melasma | Post-Inflammatory Hyperpigmentation (PIH) |
|---|---|---|
| Pattern | Symmetrical (both cheeks, forehead, nose) | Irregular, often one-sided or localized |
| Triggers | UV rays, visible light, hormonal shifts | Acne, skin injury, localized inflammation |
Skipping non-sticky sunscreen in humid weather because of a sticky feel leaves your skin vulnerable to worsening these dark spots. Traditional heavy creams trap sweat and sebum under a suffocating layer, causing that greasy discomfort. Instead, a water-light gel formula, ideal as a non-sticky sunscreen for humid weather, uses hydration science to your advantage. Ingredients like hyaluronic acid pull moisture from the humid air into your skin, while coconut water cools and refreshes, allowing your skin to breathe without feeling sticky or heavy.
To fade that one-sided patch, incorporate a serum with niacinamide, which helps visibly reduce excess melanin and calm inflammation. Follow up every morning with a lightweight, sweat-proof gel sunscreen. Apply two finger-lengths to your face and neck, ensuring you get broad-spectrum SPF 50 protection that feels like a fresh drink of water for your skin, making daily wearability and reapplication easy even in the stickiest weather.
Hinglish version: https://aqualogica.in/blogs/faq/melasma-vs-pih-one-sided-dark-patch-humid-weather-hinglish
