6. Why not just cover up with clothing instead?
Clothing helps but won't replace sunscreen, says Treadwell. And not all clothing is created equal when it comes to shielding from the sun's rays. "Clothing works as long as it is a tight weave," she says.
You can test the weave to see if it is tight enough, says Began. "If you shine a strong flashlight through, you shouldn't see light on the other side."
Clothing that is treated to provide sun protection, available at sporting goods stores and online, would be preferred to tightly woven clothing without it, Began says.
7. What about the mess made with sunscreens containing titanium and zinc oxide, especially the stains on clothing and the messy feel?
You may consider spending a little more, says Treadwell. "I would say the brand name ones tend to be a little more elegant, not as thick," she says.
Or you can look on the thickness as a blessing. The physical blocking screens "leave a little sheen on the skin," she says. So it's easy to see where you have missed.
Shop around for different brands, Began says. "Everyone's skin reacts differently to the different vehicles [used in the sunscreens]," she says. "It's like picking a brand of cosmetic."
8. What else should I know about sunscreen, and what else can I do to protect myself from the sun?
Use enough sunscreen, and use it correctly, experts say. "Make sure you are applying at least an ounce to all sun-exposed areas," says Badreshia-Bansal. She recommends reapplying every two hours.
"I recommend my patients put the sunscreen on about 30 minutes to an hour before they go out the door and then reapply again when they are out in the sun," Began says. "And then, if they have a lot of sweating or have done some swimming, anything that may have decreased the concentration, they should reapply it."
You can use the SPF as a rough guide to how long the sunscreen will protect you, she says. If you use a 30 SPF, for instance, and generally burn in 10 minutes without sunscreen, you can expect about 300 minutes or five hours of protection, she says.