October 13, 2026

A pimple heals, but the dark spot it leaves behind can linger for months. If your acne marks become darker after spending time outdoors, your sun-protection routine may need attention. Acne marks develop because of inflammation, not because of the sun. However, UV exposure can intensify pigmentation and prolong its visibility. That's why using sunscreen for dark spots is an essential step while your skin heals. What Is Post-Inflammatory Hyperpigmentation (PIH)? Post-inflammatory hyperpigmentation (PIH) refers to flat, dark marks that remain after skin inflammation or injury. Acne, picking pimples, irritation and aggressive skincare can trigger excess melanin production, leaving brown or grey-brown spots behind. Here's how it happens: Inflammation stimulates pigment-producing cells called melanocytes. Melanin production increases in the affected area. Excess pigment accumulates in the skin. The breakout heals, but the dark mark remains. These dark spots from pimples are particularly common in people with deeper skin tones, although anyone can develop them. Unlike acne scars, PIH usually changes skin colour rather than its texture. Learn more in our guide to post-inflammatory hyperpigmentation: causes, prevention and treatments . How Do UV Rays Worsen Pigmentation? Sun exposure doesn't have to cause a new breakout to affect your skin. It can make existing pigmentation more noticeable. Here's how UV exposure can worsen post-acne marks: Deepens existing dark spots: UV exposure st…

October 13, 2026

The difference between chemical and physical sunscreen lies mainly in their UV filters, texture, and finish, not in one type being universally better. Both chemical and mineral sunscreens can provide effective sun protection when formulated correctly and used as directed. In India's hot, humid climate, lightweight chemical or hybrid formulas may feel more comfortable for everyday wear, while mineral sunscreens can be a good option for sensitive or reactive skin. So, which sunscreen is better for Indian weather? The right choice depends on your skin type, preferred finish, and whether the formula feels comfortable enough to apply generously and reapply regularly. What Is Chemical Sunscreen? A chemical sunscreen uses organic UV filters that absorb ultraviolet radiation and release the energy through processes such as heat. Different filters protect against different parts of the UV spectrum, so modern formulas combine multiple filters to provide broad-spectrum UVA and UVB protection. Common Chemical Sunscreen Ingredients Some older or widely used UV filters include: Avobenzone Octinoxate Octocrylene Homosalate Oxybenzone Newer-generation filters include Tinosorb S, Tinosorb M, Uvinul A Plus and Uvinul T 150 . The filters used depend on the specific sunscreen formulation. Benefits of Chemical Sunscreen Chemical sunscreens can be a practical choice if you prefer: Lightweight textures: Many formulas spread easily and feel comfortable in hot, humid weather. Minimal white cast: They…