What You Should Know About Sunscreen Protection

The importance of sunscreen has gained popularity in recent years, but it can be a bit confusing to know what SPF level and sunscreen type will work best. Lily Helzer, MPH, prevention programs manager at the Nevada Cancer Coalition, breaks it down and shares information on these products.

What level of SPF is recommended?

Sun protection factor, or SPF, is the amount of UV rays that your sunscreen is blocking. While an SPF of 30 blocks 97% of UV rays, SPF 50 blocks about 99%. Although sunscreens above SPF 50 are sold, they do not necessarily provide much additional protection.

When choosing your sunscreen, make sure it blocks both UVA and UVB rays. UVB rays are what cause skin reddening and sunburn and most damage to the skin’s outermost layers. UVA rays are a bit sneakier and account for 95% of radiation that reaches the planet’s surface. These rays are primarily responsible for premature skin aging as they penetrate more deeply into the skin than UVB rays.

What are the pros and cons of lotion vs aerosol sunscreens?

Both lotion and aerosol sunscreens are effective if applied correctly. Lotions are a bit easier to use, especially for kids, as you can see where the sunscreen has been applied and ensure that they are properly protected.

If you do use an aerosol sunscreen, be sure to hold the nozzle close enough to your skin that a sheen appears. The sheen indicates that you are applying an appropriate amount. Although you can spray the sunscreen directly onto your skin, you must still rub it in to receive maximum coverage benefits.

Are new powder sunscreens effective?

Only aerosol and lotion sunscreens are currently approved in the United States as appropriate methods of sun protection. However, if you do use a powder sunscreen, be diligent in ensuring the powder is not being inhaled by children when applied.

How often should I reapply sunscreen?

Sunscreen should be applied 15-20 minutes before venturing outside to ensure your skin has absorbed the product. When out and about, you should be reapplying every two hours to prevent sunburn. If you are sweating or swimming, you should reapply more often, about every 1.5 hours.

Whether you are hiking, swimming, or simply working outside in the yard, using sunscreen is an important step in protecting yourself from the sun’s harmful rays.

If you experience a severe sunburn and it blisters and you experience a fever, vomiting or nausea, seek care at the closest emergency department.

Learn more about Northern Nevada Health System’s 24/7 ER locations and Urgent Care clinics