Key Points Sunscreen alone isn’t enough to protect skin from the sun’s harmful rays. “In a perfect scenario, you would do more than apply sunscreen,” says Ife J. Rodney, M.D ., founding director of Eternal Dermatology + Aesthetics. One is that many people who use sunscreen don’t apply enough, Dr. Rodney says. Wearing sunscreen daily—and reapplying as needed—is a good start, Dr. Rodney says. Dr. Rodney also stresses the importance of wearing sunscreen when you’re indoors.