Dermatologists debunk common misunderstandings about sunscreen.

If you are hazy on sunscreens and how to use them, your health could be on the line. Being out in the sun without proper protection from ultraviolet light exposure can increase your risk for sunburn, wrinkles, and skin cancer. Skin cancer is the most common type of cancer in the U.S., with more than 3.5 million cases diagnosed every year.

There are two types of ultraviolet light: UVB, which causes sunburn, and UVA, which penetrates the skin more deeply and can cause wrinkles. Both UVB and UVA rays can lead to skin cancer.

These dermatologists clear up myths about sunscreen