By Clear Skin Dermatology & Cosmetic Surgery
As summer approaches and we spend more time outdoors, protecting your skin from the sun’s harmful rays becomes more important than ever. At Clear Skin Dermatology & Cosmetic Surgery, we want to help you enjoy the sun safely while preserving the health and beauty of your skin. One of the most effective ways to prevent sunburn, premature aging, and skin cancer is by practicing smart sunscreen habits.
In this post, we’ll cover everything you need to know about sunscreen—from how it works to how to choose and apply it properly. Plus, we’ll answer common questions in our comprehensive Q&A section.
Why Sunscreen Matters
Ultra® XC violet (UV) rays from the sun are invisible, but their effects can be lasting and severe. There are two types of UV rays that affect our skin:
- UVA Rays: Penetrate deep into the skin and contribute to premature aging and wrinkles.
- UVB Rays: Affect the surface of the skin and are primarily responsible for sunburn.
Both types of rays can damage the DNA in skin cells, which can lead to skin cancer. Sunscreen acts as a shield, either absorbing or reflecting UV rays before they can cause harm.
Choosing the Right Sunscreen
Not all sunscreens are created equal. Here’s what to look for:
1. Broad-Spectrum Protection
This ensures the sunscreen protects against both UVA and UVB rays.
2. SPF 30 or Higher
SPF (Sun Protection Factor) refers to the sunscreen’s ability to block UVB rays. SPF 30 blocks about 97% of UVB rays. Higher SPFs offer slightly more protection but no sunscreen blocks 100%.
3. Water-Resistant Formulas
Ideal for swimming, sweating, or high-humidity environments. Note: “Water-resistant” does not mean waterproof—reapplication is key.
4. Non-Comedogenic
Look for sunscreens labeled non-comedogenic if you have acne-prone or sensitive skin.
5. Mineral vs. Chemical Sunscreens
- Mineral (Physical): Contain zinc oxide or titanium dioxide. Great for sensitive skin and start working immediately.
- Chemical: Absorb UV rays and may feel lighter on the skin but require 15–30 minutes to become effective.
Best Practices for Applying Sunscreen
✅ Apply 15–30 Minutes Before Going Outside
This gives chemical sunscreens time to absorb and become effective.
✅ Use Enough
Most people don’t use enough. A full body application requires about 1 ounce (a shot glass full) of sunscreen.
✅ Don’t Forget These Areas:
- Ears
- Back of the neck
- Tops of feet
- Scalp or hairline
- Lips (use a lip balm with SPF)
✅ Reapply Every 2 Hours
Or immediately after swimming, sweating, or towel-drying—even if using water-resistant sunscreen.
Additional Sun Safety Tips
- Wear Protective Clothing: Long sleeves, wide-brimmed hats, and UV-blocking sunglasses can add extra protection.
- Seek Shade: Especially during peak sun hours (10 AM to 4 PM).
- Avoid Tanning Beds: They emit harmful UVA rays and increase the risk of skin cancer.
Q&A: Sunscreen & Summer Skin Care
Q: Can I skip sunscreen on cloudy days?
A: No. Up to 80% of UV rays can penetrate clouds, so sunscreen is still necessary.
Q: What’s the difference between SPF 30 and SPF 50?
A: SPF 30 blocks about 97% of UVB rays; SPF 50 blocks about 98%. The difference is minimal, but higher SPFs are useful for those with fair skin or a history of skin cancer.
Q: Is it safe to use sunscreen on babies?
A: For infants under 6 months, it’s best to keep them out of direct sunlight and use protective clothing. For older babies, choose a gentle, mineral-based sunscreen.
Q: How do I protect my skin if I wear makeup?
A: Use a moisturizer or primer with SPF underneath your makeup. Consider powder or spray sunscreens for touch-ups during the day.
Q: Does sunscreen expire?
A: Yes. Check the expiration date and discard any sunscreen that’s more than 3 years old or has changed in texture or smell.
Q: How can I tell if my sunscreen is still effective after being left in a hot car?
A: Heat can degrade sunscreen. If it’s been exposed to high temperatures for extended periods or looks separated or smells odd, replace it.
Protect Your Skin with Expert Help
Sun protection is a year-round commitment, but summer is when the risks are highest. At Clear Skin Dermatology & Cosmetic Surgery, our board-certified dermatologists can help you choose the best sun protection and address any concerns—from sun damage to skin cancer screenings.
📍 Office Locations:
St. Charles Office
2560 Foxfield Rd Suite 100
St. Charles, IL 60174
📧 stc@cskinderm.com
📞 (630) 443-8855
Oak Park Office
1050 Chicago Ave
Oak Park, IL 60302
📧 op@cskinderm.com
📞 (708) 383-6366
Sycamore Office
2128 Midlands Ct, Suite 106
Sycamore, IL 60178
📧 syc@cskinderm.com
📞 (815) 895-9100
🌐 Visit Our Website
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Enjoy your summer, but don’t let the sun damage your skin. Make sunscreen a daily habit—and let Clear Skin Dermatology & Cosmetic Surgery be your partner in lifelong skin health.