Skin cancer is the most common form of cancer in the United States.
Sunscreen can protect your skin from the sun's damaging rays when applied correctly.
Dermatologists recommend applying sunscreen about 10-15 minutes before going outside so it has a chance to absorb into your skin - and don't skimp on the amount.
"You must put on 1 ounce of sunscreen, that's the amount in a shot glass, to cover your whole body. Most people don't put on that much," Dr. Melissa Piliang said.
The American Academy of Dermatology recommends choosing a sunscreen that is SPF 30 or more and 'broad spectrum' to protect against UVA and UVB rays.
Sunscreen should also be reapplied at least every 2 hours especially if you're swimming or sweating.
Also, find a type of sunscreen you will actually use, for example some people prefer a spray because it's quick and you don't need to rub it in.
Whatever type you pick, just make sure you apply it liberally for maximum protection.
"If you're putting it on too thin, you're not getting an SPF 30, you're getting more like an SPF 10, so sometimes it's easier to put on a higher potency to get you to 30, but you want to put on a nice, thick coat," Dr. Piliang said.
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.