The discussion around sunscreen has shifted from being a beach necessity to a daily skincare essential, raising questions about its use indoors. Dr. Kashish Kalra, founder of Dr Kalra Skin Clinic, explains that sunlight comprises three types of ultraviolet (UV) rays: UVC, UVB, and UVA. While UVC rays are blocked by the Earth's atmosphere and UVB rays cannot penetrate glass, UVA rays can pass through and cause skin issues like pigmentation and premature aging. Dr. Nirupama Parwanda, a dermatologist, emphasizes that prolonged exposure to sunlight through windows can still harm the skin. Additionally, with increased screen time, concerns about blue light exposure have emerged, particularly its potential to cause pigmentation in darker skin. However, the impact of blue light from screens remains a topic of debate. Ultimately, the decision to wear sunscreen indoors hinges on individual lifestyle and sun exposure, with professionals who frequently encounter sunlight needing to be more vigilant about application.