What is sunscreen, and why is it important? -
Sunscreen is a lotion, spray, or gel designed to protect the skin from harmful ultraviolet (UV) rays. It helps prevent sunburn, skin cancer, and premature aging caused by sun exposure.
What does SPF mean? +
SPF (Sun Protection Factor) indicates how well the sunscreen protects against UVB rays, which are responsible for sunburn. For example, SPF 30 blocks approximately 97% of UVB rays.
What’s the difference between UVA and UVB rays? +
- UVA rays penetrate deeper into the skin, causing aging and long-term damage.
- UVB rays are responsible for sunburn and contribute to skin cancer.
A broad-spectrum sunscreen protects against both.
How often should I reapply sunscreen? +
Reapply every 2 hours, or immediately after swimming, sweating, or towel-drying.
How much sunscreen should I apply? +
Use about 1 ounce (a shot glass full) for your entire body. Apply liberally to all exposed skin, including often-missed spots like ears, neck, and feet.
Can I skip sunscreen on cloudy days? +
No. Up to 80% of UV rays can penetrate through clouds. Sunscreen is essential even on overcast days.
Is sunscreen safe for sensitive skin? +
Yes, but choose a sunscreen labeled "for sensitive skin" or containing mineral filters like zinc oxide or titanium dioxide, which are gentler.
Can I use sunscreen on babies? +
For babies under 6 months, avoid direct sunlight and use protective clothing. For older babies, choose sunscreens formulated for sensitive skin.
What’s the difference between chemical and mineral sunscreens? +
- Chemical sunscreens absorb UV rays and convert them into heat (e.g., avobenzone, oxybenzone).
- Mineral sunscreens (or physical sunscreens) block UV rays by reflecting them (e.g., zinc oxide, titanium dioxide).
Mineral sunscreens are often preferred for sensitive skin.
Does sunscreen prevent tanning? +
It reduces tanning by protecting the skin from UV rays, but it may not completely prevent it. To avoid tanning, use sunscreen with a higher SPF and reapply frequently.
Can I use sunscreen under makeup? +
Yes. Apply sunscreen as the last step in your skincare routine, before applying makeup. Look for makeup products with SPF for added protection.
Is a higher SPF better? +
Higher SPF offers more protection, but the difference becomes minimal after SPF 30 (97% UVB protection). SPF 50 blocks 98% of UVB rays. Reapplication is more critical than choosing SPF beyond 50.
Do I need sunscreen indoors? +
Yes, if you’re near windows, as UVA rays can penetrate glass. Use sunscreen if you’re exposed to sunlight indoors.
Can sunscreen expire? +
Yes, check the expiration date. Expired sunscreen may not provide effective protection.
How long should I wait after applying sunscreen before going outside? +
Wait 15–30 minutes after applying chemical sunscreen to allow it to absorb. Mineral sunscreens work immediately.
What happens if I don’t use sunscreen? +
Without sunscreen, you’re more prone to sunburn, premature aging, hyperpigmentation, and an increased risk of skin cancer.
Does water-resistant mean waterproof? +
No. Water-resistant sunscreens protect for a limited time during water exposure (40–80 minutes). Reapply after swimming.
Can I use sunscreen every day? +
Yes! Daily use of sunscreen is crucial to protect against cumulative sun damage.