Blog

Sunscreen is one of the most talked-about topics in skincare, and also one of the most confusing. Between online advice, product trends, and ingredient debates, it’s easy to lose sight of what matters most: keeping your skin protected. 

At Connolly Dermatology, we help patients cut through the confusion and focus on what works. Below, we provide helpful information on choosing and using the right product, as well as clarify common myths surrounding the safety and effectiveness of sunscreen.

Why Sunscreen Isn’t Optional

A truth about sunscreen that a vast body of research supports is that it protects your skin even on days when the sun doesn’t feel strong. Ultraviolet (UV) radiation still reaches the skin and causes lasting changes beneath the surface. Over time, these effects build up, contributing to visible aging and increasing the risk of skin cancer.

The two types of UV rays that cause sun damage are:

• UVA: These penetrate deeply, contributing to fine lines, wrinkles, pigmentation, and other visible signs of skin aging.
• UVB: These are responsible for sunburn and play a significant role in skin cancer development.

Sunscreen shields your skin against UVA and UVB rays. Its benefits include:

Protecting Against Skin Cancer

According to the Skin Cancer Foundation, about one in five Americans will develop skin cancer by the age of 70. Applying broad-spectrum SPF daily helps prevent DNA damage that can lead to skin cancers such as basal cell carcinoma, squamous cell carcinoma, and melanoma.

Preventing Photoaging and Pigmentation

UV exposure is one of the leading causes of premature aging. It breaks down collagen, triggers pigment changes, and contributes to uneven skin texture. Sunscreen helps you maintain a smoother, more even complexion by blocking or absorbing the rays that cause these effects.

Sunscreen Serves as a Pillar of Sun Protection 

Wearing long-sleeved clothing, donning wide-brimmed hats, and practicing other sun protection habits work best when used alongside regular sunscreen application. 

The Truth About Sunscreen: Common Myths vs. Reality

Our dermatologists often hear the same questions and concerns from patients, which is why we’ve outlined some of the most common sunscreen myths and what’s actually true.

Myth: “I don’t need sunscreen on cloudy days or indoors.”

Reality: UVA rays pass through clouds, windows, and even some fabrics. Daily sunscreen protects against this constant, low-level exposure.

Takeaway: Apply sunscreen every morning as part of your routine, even if you plan to stay mostly indoors.

Myth: “Higher SPF means stronger protection.”

Reality: SPF or sun protection factor measures how long UVB protection lasts. SPF 30 blocks about 97% of UVB rays, while SPF 50 blocks about 98%. Above that, benefits level off.

Takeaway: To protect your skin with sunscreen, choose a broad-spectrum product with at least SPF 30, and reapply as directed. 

Myth: “Sunscreen prevents vitamin D absorption.”

Reality: Wearing sunscreen for skin health doesn’t block your body’s ability to make vitamin D. Most people get enough vitamin D through brief incidental sun exposure, even when they use SPF as directed.

Takeaway: Protecting your skin doesn’t cause deficiency. If you’re concerned about vitamin D, ask your dermatologist about options like supplements.

Myth: “One morning application protects all day.”

Reality: Sunscreen breaks down over time due to sunlight, sweat, and contact with skin or clothing.

Takeaway: Reapply every two hours, and more often after swimming, sweating, or towel-drying.

Myth: “Mineral sunscreen is always better than chemical sunscreen

Reality: They work differently, but both mineral and chemical sunscreens are effective when used correctly. 

Mineral formulas containing zinc oxide or titanium dioxide sit on top of the skin and reflect light. Meanwhile, chemical sunscreens with avobenzone or octocrylene absorb UV rays before they cause harm. 

Takeaway: The best sunscreen is one you’ll use consistently. Choose a formula that fits your skin type and comfort level.

Myth: “Tinted or cosmetic sunscreens don’t really work.”

Reality: Tinted sunscreens labeled SPF 30 or higher can provide adequate protection. Many also contain iron oxides that help defend against visible light, which can worsen pigmentation.

Takeaway: You can protect your skin with sunscreen that’s tinted. These formulations can be an excellent choice, especially for patients with melasma or post-inflammatory hyperpigmentation.

How To Choose the Right Sunscreen

With numerous products available, selecting the right sunscreen for skin health can be overwhelming. Learning how to understand labels makes the process easier.

Familiarize Yourself With Sunscreen Terms

The information on a sunscreen label can tell you a lot about its performance and suitability for daily use. Focus on these terms when comparing products:

• Broad-Spectrum: Protects against both UVA and UVB rays
• SPF 30 or Higher: Provides sufficient protection for most daily needs
• Water-Resistant: Stays on during swimming or sweating, typically for 40 to 80 minutes
• Non-Comedogenic: Less likely to clog pores, making it a good option for acne-prone skin

Pick the Right Texture

Sunscreen products come in various textures and consistencies, from thick and goopy to thin and watery, as well as different application methods. Opt for the one that matches your skin needs and lifestyle.

• Creams and Lotions: Best for dry or mature skin
• Gels and Fluids: Work well for oily or acne-prone skin
• Sticks: Convenient for quick touch-ups and for applying on children
• Sprays: Cover large areas quickly, but should be applied evenly to ensure full protection

Consider Your Skin Type and Condition

Consider these guidelines when selecting a sunscreen for skin health:

• Sensitive Skin: Opt for mineral-based, fragrance-free formulas that are less likely to irritate your skin.
• Acne-prone Skin: Choose non-comedogenic, lightweight fluids or gels that won’t block pores and trigger flare-ups.
• Rosacea or Melasma: Tinted mineral sunscreens with iron oxides block visible light while diminishing the appearance of dark spots, redness, and blemishes.
• Dry or Mature Skin: Formulas with ceramides or hyaluronic acid moisturize skin while protecting it from the sun.

Don’t Skip These Areas

Even with daily sunscreen use, certain parts of the body can be easily overlooked. These areas are just as vulnerable to UV damage and benefit from consistent protection. Apart from applying broad-spectrum sunscreen on your product, don’t forget:

• Lips: Apply SPF lip balm.
• Scalp and Hairline: Use a spray or powder SPF product for areas with thinning hair and exposed scalp.

If you’re purchasing sunscreen for a child, remember that their skin is more sensitive than that of adults. Be sure to select gentle, fragrance-free mineral formulas that won’t irritate their skin. You can find products specially formulated for children in most drugstores.

Protect Your Skin With Sunscreen: Best Practices

A few simple habits can make sunscreen more effective and easier to use every day. These best practices help you get the full benefit from any formula you choose:

• Apply Enough: Use about half a teaspoon for the face and neck, and roughly one ounce for full-body coverage. Cover all exposed areas, including ears, neck, hands, scalp, and the tops of the feet.
• Reapply Regularly: Refresh every two hours, or sooner after swimming, sweating, or towel-drying.
• Make It the Last Skincare Step: Apply sunscreen after moisturizer and before makeup.
• Use It Daily: UV exposure happens year-round, even on cloudy days.

Safety and Side Effects of Sunscreen

Sunscreen is one of the most carefully studied skincare products available, and adverse reactions are uncommon. Still, mild irritation can occur, although it is typically temporary and resolves on its own or after switching to a different product.

Common reactions include mild stinging and redness. Less common side effects include:

• Severe itching, redness, and swelling
• Fluid-filled blisters
• Scaly patches

If you experience a significant or persistent reaction, contact your dermatologist. We can help identify the cause and recommend products that protect your skin without triggering sensitivity.

Ingredients To Watch For

When trying a new sunscreen, check the label for ingredients that can irritate sensitive skin. The most common culprits include:

• Added fragrance or essential oils
• Alcohol in high concentrations
• Certain chemical filters, such as oxybenzone and octinoxate, which can occasionally irritate reactive skin

To minimize potential irritation:

• Choose fragrance-free and alcohol-free options.
• Patch test on a small area before using it on your face or body.
• Look for mineral formulas if your skin is sensitive.

When To Consult a Dermatologist

You should schedule a visit if you:

• Experience Persistent Irritation: Redness, stinging, or breakouts that persist even after trying several formulas may signal a sensitivity that needs evaluation.
• Suspect Skin Cancer: Regular skin checks and lesion screening are essential for detecting precancerous or cancerous changes early, particularly if you’ve had significant sun exposure or a family history of skin cancer.
• Develop Pigmentation or Melasma: If you notice dark spots or uneven tone that worsens with sun exposure, a dermatologist can adjust your plan and recommend sunscreen formulations that help manage discoloration.

Sunscreen in Special Situations

Changes in environment, activity, or health can all affect how well sunscreen performs and how often you should reapply.

• Outdoor Sports and Swimming: Choose water-resistant formulas and reapply after heavy sweating or towel-drying. Stick formats are convenient for touch-ups around the nose and ears.
• Travel and High Altitudes: UV intensity increases with elevation and is amplified by reflection from snow or water. Keep sunscreen accessible and apply before exposure, not after you arrive.
• Photosensitizing Medications: Certain antibiotics, acne medications, and skin treatments make skin more reactive to light. Daily sunscreen and sun avoidance during peak hours are key.
• Children and Pregnancy: For children and expectant parents, mineral-based sunscreens containing zinc oxide or titanium dioxide are gentle and reliable options.

Frequently Asked Questions About Sunscreen

What should I do if sunscreen gets in my eyes?

Rinse gently with cool water and avoid rubbing. If irritation lasts longer than a few minutes, contact your dermatologist or an eye specialist for advice.

Can I layer sunscreen with makeup or moisturizer?

Yes. Apply sunscreen as the last step in your skincare routine and allow it to absorb before applying makeup. Many tinted or fluid sunscreens work well under foundation.

How can I remember to reapply sunscreen?

Set a reminder on your phone or keep a travel-size product in your bag for midday touch-ups. Reapplication is most important when you’re outdoors, driving, or sitting near windows.

How long does sunscreen last before it expires?

Most sunscreens remain effective for about three years. Check the expiration date on the packaging and replace any products that have changed color, smell, or texture.

Are spray sunscreens safe and effective?

Yes, when used correctly. Apply a generous, even layer and rub it in to ensure full coverage. Avoid spraying directly onto the face: spray into your hands first, then apply.

Do combination products like SPF moisturizers work?

They can, if labeled broad-spectrum with SPF 30 or higher. They’re useful for light indoor days, but for extended sun exposure, use a standalone sunscreen and reapply regularly.

Recommendations From Connolly Dermatology 

At our practice, we help patients choose sunscreens that suit their skin type, lifestyle, and comfort level. Our dermatologists often recommend the following brands, which we carry in our online store:

• CeraVe: Hydrating creams and lotions for dry or sensitive skin
• EltaMD: Lightweight, non-comedogenic options ideal for everyday wear
• MD Solar Sciences: Mineral-based formulas that work well for sensitive or post-procedure skin

Remember that broad-spectrum coverage and consistent use matter more than any single ingredient or brand name.

Sunscreen works best as part of a complete skincare plan. During consultations, we review how to layer it with other products and maintain year-round protection for healthy, balanced skin.

Keep Skin Healthy and Protected With Help From Connolly Dermatology

Sunscreen is one of the simplest and most effective ways to keep skin healthy and protected. Choosing a broad-spectrum SPF 30 or higher and applying it correctly and regularly can help prevent premature aging caused by sun damage and reduce the risk of certain types of skin cancer. 

At Connolly Dermatology, we combine medical and cosmetic care to create routines that fit your skin and lifestyle. If you’re unsure which sunscreen is right for you, our dermatologists can help guide you. Schedule a consultation today to learn how to protect and care for your skin throughout the year.