When considering sunscreen for melasma, applying extra layers on just one side of your face is generally not necessary. An even layer of broad-spectrum SPF 50 across your entire face provides optimal protection for both melasma and other pigmentation concerns.
Dr. Shweta Virmani, MD Dermatology, confirms that melasma typically presents as symmetrical discolored patches on both sides of the face. If you only have a dark patch on your right cheek, it is likely PIH caused by past acne, localized inflammation, or a minor skin injury. Indian skin falls under Fitzpatrick skin types III to V, which naturally produces more melanin and reacts quickly to irritation, making these irregular, one-sided acne marks highly common.
Piling extra sunscreen on one side does not offer better protection; it just makes your skin feel sticky and greasy, especially in humid Indian weather. Instead, you need a consistent, even layer of protection. A lightweight gel sunscreen formulated with hyaluronic acid pulls moisture from the humid air into your skin, keeping it dewy and hydrated without trapping sweat or clogging pores over that pigmented area.
Melasma vs. PIH: Identifying Your Pigmentation
| Feature | Melasma | Post-Inflammatory Hyperpigmentation (PIH) |
|---|---|---|
| Pattern & Symmetry | Symmetrical (appears on both cheeks, forehead, or nose). | Irregular and one-sided (like a single patch on the right cheek). |
| Primary Causes | Hormonal fluctuations, genetics, and UV exposure. | Acne pigmentation, skin trauma, or inflammation. |
| Sunscreen Needs | Full-face SPF 50+ to prevent UV and visible light triggers. | Full-face SPF 50+ to prevent the dark spot from deepening. |
To effectively protect your skin and fade that right cheek pigmentation, follow a smart daily routine. Apply the two-finger rule of sunscreen evenly across your whole face. Clinical data shows that visible light and UV rays induce persistent pigmentation in darker skin tones, so you must reapply your SPF 50 every 2-3 hours. To actively fade the marks, pair your sun protection with a lightweight serum containing niacinamide, which helps visibly reduce dark spots while keeping your skin barrier calm, fresh, and hydrated.
Hinglish version: https://aqualogica.in/blogs/faq/sunscreen-for-one-sided-melasma-and-pih-hinglish
