But Why: A Podcast for Curious Kids Why do we need to use sunscreen?
Jun 13, 2025
Dr. Jeff Yu, a pediatric dermatologist at Massachusetts General Hospital, shares essential insights about sun safety for kids. He explains what causes sunburn and the differences between tanning and skin damage. Listeners learn how sunscreen works and why it's crucial to apply it while engaging in summer fun. Jeff also discusses the importance of protecting eyes from UV rays and shares tips on choosing effective sunscreen types. Hydration is highlighted as vital for outdoor activities, making safe sun exposure enjoyable for everyone.
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How Sunburn Happens
- Sunburn happens when ultraviolet light damages the top skin cells, causing redness and pain.
- Darker skin offers more melanin protection, acting like an umbrella against UV damage.
Avoid Repeated Sunburns
- Avoid repeated sunburns to reduce risks of skin cancer later in life.
- Protect your skin early to prevent abnormal growths that can become dangerous.
What Causes a Tan
- Melanocytes make melanin to darken skin, which helps protect against sun damage.
- A tan is your skin's defense signaling more melanin production to shield you.