How to apply sunscreen - the basics

Sunscreen is safe and can protect your skin against skin cancer and premature aging. However, it is not as effective unless it's applied correctly. Follow these tips from dermatologists when applying sunscreen:

1. Choose a sunscreen that has an SPF of 30 or higher, is water resistant, and provides broad-spectrum coverage, which means it protects you from UVA and UVB rays. Follow these helpful tips when selecting a sunscreen.
2. Apply sunscreen generously before going outdoors. It takes approximately 15 minutes for your skin to absorb the sunscreen and protect you. If you wait until you are in the sun to apply sunscreen, your skin is unprotected and can burn.  
3. This infographic gives important information on how to protect against skin cancer, including detailing the difference between physical sunscreen and chemical sunscreen.
4. Apply enough sunscreen to cover all exposed skin.Most adults need about 1 ounce — or enough to fill a shot glass — to fully cover their body. Rub the sunscreen thoroughly into your skin.
5. Apply sunscreen to all bare skin. Remember your neck, face, ears, tops of your feet and legs. For hard‐to‐reach areas like your back, ask someone to help you or use a spray sunscreen. If you have thinning hair, either apply sunscreen to your scalp or wear a wide‐brimmed hat. To protect your lips, apply a lip balm with a SPF of at least 15.
6. To remain protected when outdoors, reapply sunscreen every two hours, or immediately after swimming or sweating. People who get sunburned usually didn't use enough sunscreen, didn't reapply it after being in the sun, or used an expired product. Your skin is exposed to the sun's harmful UV rays every time you go outside, even on cloudy days and in the winter. So whether you are on vacation or taking a brisk fall walk in your neighborhood, remember to use sunscreen. For more skin cancer prevention tips, see a board-certified dermatologist.

People who get sunburned  usually didn't use enough sunscreen, didn't reapply it after being in the sun, or used an expired product.

Your skin is exposed to the sun's harmful UV rays every time you go outside, even on cloudy days and in the winter. So whether you are on vacation or taking a brisk fall walk in your neighbourhood, remember to use sunscreen.