Published on May 01, 2026 | 4:39 PM
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Most adults think they understand sunscreen.
But every spring and summer, the same myths resurface — and they quietly increase skin cancer risk.
Sunscreen isn’t complicated.
But misinformation is persistent.
Let’s clarify what still confuses adults — and what actually protects your skin.
Ultraviolet (UV) exposure isn’t limited to beach days.
UV radiation:
Penetrates clouds
Reflects off pavement and water
Passes through car windows (UVA)
Accumulates with daily exposure
Short exposures matter.
Walking the dog.
Driving.
Sitting by a window.
Skin damage is cumulative.
SPF measures protection against UVB (burning rays), not UVA (aging and cancer-associated rays).
Here’s what SPF actually means:
SPF 15 blocks ~93% of UVB
SPF 30 blocks ~97%
SPF 50 blocks ~98%
No sunscreen blocks 100%.
And no sunscreen lasts all day.
Reapplication every 2 hours is essential — especially with sweating or swimming.
Melanin does provide some natural protection.
But it does not eliminate risk.
People with darker skin can still experience:
Hyperpigmentation
Sun damage
Skin aging
Melanoma (often diagnosed later and more aggressively)
Sunscreen is for all skin tones.
Burning is not the only sign of UV damage.
UVA rays:
Penetrate deeper
Cause collagen breakdown
Accelerate aging
Contribute to skin cancer
You may not burn — but damage can still occur.
This is why “broad-spectrum” labeling matters.
Foundation with SPF helps — but it’s rarely applied thick enough.
For proper SPF coverage, you need:
About 1/4 teaspoon for the face
Enough to evenly coat exposed skin
Most adults apply 25–50% of the recommended amount.
Layering makeup over a dedicated sunscreen works better.
Mineral sunscreens (zinc oxide, titanium dioxide):
Reflect and scatter UV rays
Are effective when properly applied
Are safe and well-studied
The issue isn’t whether they work.
It’s whether enough is applied.
Brief sun exposure can support vitamin D production.
But intentional sunburn is not necessary.
Vitamin D can be safely obtained from:
Diet
Supplements
Limited incidental sun exposure
Skin cancer risk outweighs intentional UV exposure.
Effective sun protection includes:
✔️ Broad-spectrum SPF 30+ daily
✔️ Reapplication every 2 hours outdoors
✔️ Protective clothing
✔️ Hats and sunglasses
✔️ Avoiding peak UV hours (10am–4pm)
Sunscreen is one tool — not the only one.
✔️ UV exposure happens daily
✔️ SPF doesn’t last all day
✔️ All skin tones need protection
✔️ Burning isn’t the only damage
✔️ Broad-spectrum coverage matters
Sunscreen myths persist — but the science is consistent.
Protection should be routine, not occasional.
If you’re unsure how sunscreen interacts with your medications, acne treatments, or skin conditions — schedule a quick telehealth review.
Sun safety is part of medication safety.
Protecting your skin today protects your health long-term.
Shelly House, FNP, is a Family Nurse Practitioner and Call-On-Doc’s trusted medical education voice. With extensive experience in telehealth and patient-centered care, Ms. House is dedicated to making complex health topics simple and accessible. Through evidence-based content, provider collaboration, and a passion for empowering patients, her mission is to break down barriers to healthcare by delivering clear, compassionate, and practical medical guidance.
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You feel fine.
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How to protect your skin while still enjoying the outdoors
Summer brings longer days, outdoor activity, travel, and increased sun exposure. While sunlight supports vitamin D production and mood regulation, ultraviolet (UV) radiation remains one of the leading preventable causes of skin aging and skin cancer.
Modern dermatology emphasizes consistent, layered sun protection rather than occasional sunscreen use. Protecting your skin does not mean avoiding summer — it means being intentional about exposure.
Jun 12, 2024 | 8:00 AM
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Spending time outdoors is one of the healthiest things many of us can do. Sunlight supports vitamin D production, mood regulation, and circadian rhythm balance.
But for some people, that same sun exposure can trigger unexpected reactions — not because of their skin type, but because of their medications.
Certain prescription and over-the-counter medications increase photosensitivity, meaning your skin becomes more sensitive to ultraviolet (UV) radiation. That increased sensitivity can lead to faster sunburns, rashes, blistering, pigmentation changes, and long-term skin damage.
Understanding which medications increase sun sensitivity — and why — helps you prevent avoidable complications.
Apr 01, 2026 | 10:59 AM
Why Some Antibiotics Make You More Sun-Sensitive
You start an antibiotic.
You feel fine.
Then you spend 20 minutes outside — and your skin burns faster than usual.
It’s not your imagination.
Certain antibiotics can make your skin significantly more sensitive to sunlight. Even brief exposure can trigger exaggerated sunburn, rashes, or skin irritation.
This reaction is called photosensitivity, and it matters more than most people realize.
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