Now that the sunshine is back, it's important to get back into a sunscreen habit, too.
Sun damages the DNA in skin and increases the risk of cancer, and skin cancer is the most common form of cancer in the U.S.
Sunscreen can protect skin from the damaging rays, if it's applied correctly.
Cleveland Clinic dermatologist Dr. Melissa Piliang recommends applying sunscreen about 10 to 15 minutes before going outside so it has a chance to absorb – and don't skimp on the amount.
"You must put on one ounce of sunscreen, that's the amount in a shot glass, to cover your whole body. Most people don't put on that much," Piliang said.
The American Academy of Dermotology recommends choosing a sunscreen that is SPF 30 or more and "broad spectrum" to protect against both UVA and UVB rays.
Sunscreen should also be reapplied at least every two hours, especially if you're swimming or sweating.
Piliang also suggests finding a type of sunscreen that you will actually use. For example, some people prefer a spray because it's quick and you don't need to rub it in.
Piliang says if your 4-to-8 ounce bottle of sunscreen lasts longer than your vacation or more than one summer, then you're probably not putting enough on.