Whether you’re going for a run or relaxing in the park, spending time outdoors can be a positive experience. But when you’re under the sun, it’s important to remember that UV rays can cause considerable damage to the body, increasing your risk of skin cancer, sun spots, and wrinkles. Fortunately, if you want to enjoy nature, all you have to do is wear sunscreen whenever you go out. Here are a few answers to common questions that consumers have about sunscreen.

5 Sunscreen FAQ

How should I apply sunscreen?

Use enough product to cover all exposed skin, including your feet, neck, and ears. Most adults need about 1 ounce of sunscreen. For ideal coverage, apply the sunscreen at least 15 minutes before you go outside. If you have trouble reaching certain areas, like your back, ask someone to help.

What is SPF and how much do I need?

SPF stands for “sun protection factor”, which indicates how long it will take for your skin to burn with sunscreen compared to if there was none applied. For example, SPF 30 means that your skin will take 30 times as long to redden with the sunscreen versus no protection.

For optimal skin cancer prevention, dermatologists recommend wearing an SPF of 30 or higher. It’s also important to wear a broad-spectrum product that blocks both UVA and UVB rays.

How do chemical and physical sunscreens differ?

Chemical sunscreens contain one or more ingredients that absorb UV rays. They tend not to leave visible marks after they are rubbed in.

By contrast, physical sunscreens contain zinc oxide or titanium dioxide and protect your skin by deflecting UV rays. These products tend to leave a white residue but can be more comfortable for individuals with sensitive skin.

When should you reapply?

Sunscreen should be reapplied every two hours you spend outdoors. If you go swimming or sweat a lot, the product instructions will likely recommend reapplication.

While higher SPFs may be stronger, keep in mind that they do not last longer and should be reapplied just as often as lower SPFs.

Do you only need sunscreen in the summer?

Exposure to sunlight can contribute to skin cancer and other dermatological issues during any season, including winter. You should wear proper protection anytime you go outside.

When you have concerns about your sunscreen usage, talk to a trusted skin care specialist. Elliot Rustad, MD, FAAD, of Rustad Dermatology PC in Lincoln, NE, has been serving patients as a board-certified dermatologist for more than four decades and can introduce you to the best products for your skin. This doctor can also diagnose skin cancer accurately and provide treatments that deliver high rates of success. To learn more about these resources, visit this skin care clinic online. For appointments, call (402) 484-6222.