Could cancer on your lips sound any less appealing?

Then cover your mouth. More than 60 percent of regular sunscreen-users skip their lips. But faithfully applying -- and reapplying -- SPF to 'em could reduce your risk of skin cancer there by half.

Nothing to Smile About
Many of us learned the hard, blistery way that every little sun-exposed part of our bodies -- from the tops of our feet to the tips of our ears -- needs equal sun protection. But since many of us forget our lips, it's no wonder that they're a surprisingly common spot for squamous cell carcinoma, the second most common type of skin cancer. (Here's how to make sure you're using your sunscreen right.)

Slather Selectively
Be picky about what you put on your lips. Dermatologists believe wearing shiny lip gloss can actually attract more UV rays to your lips. So use an SPF-fortified lip balm and reapply several times a day -- including after eating or swimming and whenever you touch up your lipstick. Here are the SPF ingredients to look for.

Wish you could undo summer damage and get younger-looking skin? Take the RealAge Skin Care Quiz and find out how.