Two-Finger Rule: How Much Sunscreen Do You Really Need?

According to the New York Post, dermatologist Dr. Whitney Bowe went viral by sharing the proper amount of sunscreen. She explained the details on social media, advising, “Two finger lengths should cover your face, neck, and ears for most people — it’s a pretty good rule of thumb.”

Bowe recommended using mineral sunscreen, which contains zinc oxide and titanium dioxide, to reflect ultraviolet rays from the sun. She advised rubbing it in thoroughly to avoid leaving white spots on the face.

The video featuring a doctor explaining how to apply sunscreen properly has gone viral on TikTok, with over 18,000 views as of May 31.

Bowe also answered questions from viewers one by one, resolving any curiosities.

Dr. Caren Campbell, a board-certified San Francisco dermatologist, recommends going for an ounce, which is the size of a shot glass.

“Some of the most aggressive skin cancers occur on your temples, ears, and lips, oftentimes because those are areas of the body that stick out and get more sun, but also because we forget to lather them in sunscreen,” she explained.