Ask the Experts Blog

Warmer weather is upon us and sunnier days are in sight. But before you get too excited about starting on your golden tan, make sure to slather up with sunscreen to reduce the chances of developing long-term skin damage. Dermatologist, Riddhi Shah, DO, shares her answers to some common questions about protecting your skin while enjoying the summer rays.

Q: Why is it important to wear sunscreen during the summer?
A: The sun emits UVA and UVB rays which can both play a role in skin cancer formation, aging of the skin, and skin damage. Sunscreen can protect against those rays.

Q: What do the different SPFs mean and which one is best to use?
A: The Sun Protection Factor (SPF) is a measurement of how long someone can stay in the sun with sunscreen before getting burned. For example, SPF 15 means it will take 15 times longer for your skin to burn in the sun than if you were not wearing sunscreen. The American Academy of Dermatology recommends wearing a broad spectrum sunscreen with SPF 30 or higher.

Q: How often should I reapply sunscreen?
A: Generally, it’s important to reapply sunscreen every 90 minutes to two hours. However, if you’re sweating or swimming, more frequent reapplication may be needed. It is also helpful to look at the product you’re using for guidance on how often reapplication is recommended.

Q: What about babies? Do they need sunscreen?
A: If your baby is six months or older, it is safe to use sunscreen.  To avoid irritating your baby's skin and eyes, use a sunscreen that contains zinc oxide or titanium dioxide. Also, avoid exposing your baby to the sun during peak hours—generally 10:00 a.m. to 2:00 p.m.—and dress your baby in protective clothing, a hat with a brim, and sunglasses.

Q: If I get sunburned will I be at a greater risk for skin cancer?
A: Individuals that have a history of tanning bed use, frequent and/or blistering sunburns, fair colored skin, blond or red hair, blue or green eyes, more than 50 moles, as well as many "atypical" appearing moles are at a higher risk for skin cancer. However, all individuals should wear sunscreen regardless of their skin tone because everyone can be at risk of developing skin cancers including melanoma.

Q: Will I still get enough Vitamin D if I wear sunscreen?
A: Sunscreen prevents sunburn by blocking UVB rays, which can theoretically mean sunscreen use lowers Vitamin D levels. However, practically speaking, very few people use enough sunscreen to block all UVB rays. Therefore, the UVB needed to make Vitamin D is still being absorbed by your body even if you are wearing sunscreen. Generally, 15 minutes of sun exposure a day is all people need to produce an adequate amount of Vitamin D.

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