When & How to Apply Sunscreen?

What is sunscreen, and why do you need it? Why do you need sunscreens? How much sunscreen should you use for full protection? How to apply sunscreen in the right way When to apply sunscreen How to reapply sunscreen over makeup Common mistakes to avoid when applying sunscreen Is sunscreen good for skin? How to choose the best sunscreen? Which is the best sunscreen Should you apply sunscreen before or after other products? FAQs

The moment you step outside, the sun greets you, sometimes warmly, sometimes harshly. What you can't see are the invisible UV rays that quietly affect your skin, in the form of tanning, accelerated/premature ageing, and pigmentation, even on cloudy days or when you're just sitting by a window.

That's why sunscreen isn’t just a "summer product," it's a daily essential.

However, there is a catch: most people don’t use sunscreen correctly. Some apply too little, some skip it at home, and some forget to reapply.

If you've ever wondered how to apply sunscreen, when to apply it, or even whether you should wear it at night, here is a detailed guide with all the things you want to know about sunscreens.

What is sunscreen, and why do you need it?

Sunscreen is a skincare formulation that can be in the form of a lotion, gel, or spray, protecting your skin from the sun's UV rays. There are two main types of sunscreen formulations:

Physical (mineral) sunscreens: These are formulated with ingredients like zinc oxide or titanium dioxide. They sit on top of your skin and act like a mirror, bouncing UV rays away.
Chemical sunscreens: These are formulated with filters like avobenzone or oxybenzone, absorbing UV rays and neutralizing them before they harm your skin.

Why do you need sunscreens?

Your skin, when exposed to the harmful UV rays for a prolonged period, can suffer from an array of skin issues. UV rays don't just cause tanning; they break down collagen, leading to wrinkles, trigger pigmentation (dark spots), and increase the risk of skin cancers.

Which is why dermatologists say sunscreen is the most important anti-aging product you'll ever use.

How much sunscreen should you use for full protection?

To ensure that your sunscreen effectively protects your skin against the sun's harmful rays, it is crucial to use it in the right quantity.

Here's a mistake almost everyone makes: they use too little sunscreen on their face.

For your face and neck: You must use about ½ teaspoon or two fingers' length of sunscreen.
For your whole body: about 1 shot glass worth (30 ml).

Using less than this reduces protection drastically. Think of sunscreen like an umbrella - if you don't open it fully, you'll still get wet.

How to apply sunscreen in the right way

Along with using the right quantity, applying it in the right manner is equally important. Here’s a simple step-by-step on how to apply sunscreen the right way:

Start with clean, moisturized skin: Use it as the last step. Sunscreen works best on skin that's prepped.
Use the right amount. Don't be stingy; more is better than less.
Apply evenly: Spread it across your face, neck, ears, and any exposed skin.
Don't forget hidden spots: Ensure you apply the sunscreen all over, including ears, eyelids, back of neck, tops of hands, and feet.
Wait before stepping out: If it's chemical or hybrid sunscreen, give it 15-20 minutes to activate. Mineral sunscreens work instantly.

When to apply sunscreen

Now that you know why sunscreen application is important, let's understand when to apply sunscreen in a skincare routine.

Here's a simple skincare order to follow while applying sunscreen in the day:

Cleanser
Toner/Essence
Face Serum
Moisturizer
Sunscreen (always last, but before makeup application)

While applying sunscreen, it's also important to know when you need it.

So, remember,

In the morning: Apply every day, even indoors, as UV rays enter through windows.
Reapply every 2-3 hours, if you’re outdoors or swimming, or sweating profusely.
For the night: You don't need sunscreen unless you're exposed to artificial UV lights.

How to reapply sunscreen over makeup

Reapplication of sunscreen is equally non-negotiable. However, this is where most people get stuck.

You don't need to ruin your foundation or blush to stay protected. Here's how to reapply sunscreen over makeup:

Use a sunscreen mist or spray- just spritz and pat lightly.
Try a sunscreen powder- these are easy to brush over your makeup.
Carry a compact with SPF for quick touch-ups.

Tip: If you're indoors and away from direct sunlight, you can reapply less frequently. But outdoors, reapplication is a must.

Common mistakes to avoid when applying sunscreen

Avoid these common mistakes people make while using sunscreen.

Using too little: Always use the recommended amount.
Skipping cloudy days: UV rays penetrate clouds and snow.
Forgetting ears, neck, and hands: These areas are more vulnerable and age fastest.
Mixing sunscreen with moisturizer or foundation: While such 2-in-1 products might reduce the number of products you need, they can dilute sun protection.
Not reapplying: Sunscreen wears off after 2-3 hours and needs reapplication.

Is sunscreen good for skin?

Absolutely. In fact, dermatologists call it the best skincare product for long-term health.

Here are some benefits of sunscreen you must remember:

Prevents premature aging (wrinkles, fine lines).
Reduces the risk of skin cancers.
Protects against sunburn and pigmentation.
Keeps skin tone even.

How to choose the best sunscreen?

While picking a sunscreen for your skin, consider the following factors:

Look for broad-spectrum protection (for UVA and UVB cover) with PA++++
Choose SPF 35 or higher for daily use.
Pick sunscreen texture based on skin type:

Gel-based or matte for oily skin.
Creamy for dry skin.
Lightweight, fragrance-free for sensitive skin.

Look at the ingredients to ensure it is skin-friendly:
- Green tea and niacinamide for oil control and brightening
- Ceramides for hydration, weakened skin barrier
- Opt for mineral sunscreen for sensitive skin, pregnancy, teens, and kids.

Which is the best sunscreen

The best sunscreen is one that you'll use every day without fail. Here are a few options:

Should you apply sunscreen before or after other products?

This is one of the most common questions. The answer: Always last in your skincare routine, before makeup.

It is because sunscreen needs to form a protective layer on top of everything else. If you put it under other products, it won't shield properly.

Sunscreen isn't just for beach days-it's an everyday must. Knowing how to apply sunscreen, when to apply it, and how to reapply sunscreen over makeup makes all the difference in keeping your skin healthy and glowing. If you remember just three things about it, let it be these: apply generously, reapply often, and use it every single day. Your future skin will thank you.

FAQs

Should I apply sunscreen at night?

No, you don't need to apply sunscreen at night because there's no UV exposure.

When to apply sunscreen during makeup routine?

Apply sunscreen after moisturizer and before makeup. Think of it as the bridge between skincare and makeup.

What are the benefits of applying sunscreen at night?

Truthfully, there are no benefits to applying sunscreen at night-your skin doesn't face UV rays then. At night, focus on hydration and repair with a good moisturizer or serum instead.