Do You Really Need Sunscreen If You're Indoors All Day?

You work from home. Your commute is ten steps from your bed to your desk. The only sunlight you see is through a window. Surely sunscreen is optional at this point.

It isn't. And here's why that window is more of a problem than you think.

UVB vs UVA - The Distinction That Changes Everything

SPF protects you from UVB rays - the ones that cause sunburn. UVB rays are blocked by glass. So yes, if UVB were the only concern, you'd be fine indoors.

But UVA rays - the ones responsible for premature ageing, pigmentation, and long-term skin damage - pass straight through glass. Your window is not protecting you. The light coming through it is quietly doing its thing to your skin whether you notice it or not.

What About Blue Light?

If you're sitting in front of a screen all day - which, if you work from home, you are - there's growing evidence that blue light from screens contributes to pigmentation, particularly on darker skin tones. Most sunscreens don't protect against blue light, but antioxidant-rich formulas help neutralise the damage.

The Honest Answer

If you sit near a window, yes - sunscreen every day. If you're in a windowless room away from screens all day, you have slightly more wiggle room, but building the habit regardless is the smarter long-term move. Skin damage is cumulative. The days you skip aren't dramatic in isolation. They add up.

The Practical Bit

If texture and heaviness are what's stopping you from wearing SPF indoors, you need a lighter formula. A fluid sunscreen that feels like nothing is far easier to apply every morning than something that feels like a commitment.

👉 Second Skin Fluid Sunscreen SPF 50 PA++++ - broad spectrum, lightweight, and easy enough to wear every single day. Link in bio.