Myth: My child won't get burned if she's wearing SPF 50.
Truth: If you don't apply enough -- or if you don't reapply it -- your child can still get burned, says Ann Haas, MD, chair of the AAD's Youth Education Committee. The guideline is to apply at least an ounce of sunscreen over your child's entire body; with spray sunscreens, make sure you saturate all of your child's skin. You also need to put more product on your child every two hours and after she swims or sweats a lot. "The term 'waterproof' is misleading -- all it means is that the sunscreen protects you for up to 80 minutes in the water," says Elizabeth McBurney, MD, clinical professor of dermatology at Tulane University School of Medicine, in New Orleans. "But some will still wash off in the water and be rubbed off when your child dries off with a towel."