Sunscreen: Doctors Answer Your Top 5 Qs

With recent news that skin cancer rates among women are soaring, RedPlum's serving up a crash course in sunscreen application.

Sure, you already know that wearing sunscreen is critical for protection against the sun's harmful rays-after all, wearing it can not only prevent certain forms of skin cancer, but also helps alleviate nasty sunburns and protects against photo damaged skin (think brown spots and wrinkles). Yet even though you may lather up every time you step outside, you still might not be covered. We teamed up with an expert to understand what we need to do to keep ourselves protected.

How do I know which sunscreen is right for me?

There are a few key things you'll want to look for in a perfect sunscreen. Dr. Stuart Kittay, a dermatologist in Danbury, Connecticut, recommends choosing a sunscreen with a SPF (sun protection factor) of at least 15. It should also offer protection from both UVA and UVB radiation (those that are labeled "broad-spectrum" will protect you from both).

How much should I use?

Whatever you do, don't be stingy with your sunscreen! You'll want to apply a generous and even coating. According to Dr. Kittay, 1 oz. (about a palm full) will provide adequate protection for the average adult.

When should I apply sunscreen?

Although most people lather up once they're already outside, your first covering of sunscreen should actually be applied 15 to 30 minutes prior to stepping into the sun. This allows time for it to absorb into your skin.

How often should I re-apply?

"Reapplying helps to maintain protection," says Dr. Kittay. He recommends reapplying sunscreen every 2 hours or after taking a dip or breaking a sweat - this also goes for sunscreens labeled as waterproof or sweatproof.

Do I need to put it everywhere?

You should cover any exposed surface with sunscreen. Start with the top and work your way down. "This includes applying sunscreen to the part of your hair," says Dr. Kittay. Or, if you're worried about ruining your "do" with sunscreen, simply plop on a hat. According to Kittay, the scalp is an area often left unprotected, and also an area where doctors commonly find signs of skin cancer. And don't forget to protect those luscious lips - use a lip balm with SPF and re-apply every hour.

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