You may not be using enough sunscreen or applying it correctly — we asked a doctor for proper sunscreen application tips

Singapore’s UV index level is at an extreme high of 11 today (Apr 9) — again. And this searing heat isn’t about to let up soon — the National Environment Agency (NEA) has warned of hot weather and high ultraviolet (UV) levels in Singapore until June. UV index readings of 11 and above are considered extreme, while 8-10 rates as very high. What’s all the fuss over the UV levels, you ask. Prolonged UV exposure causes skin cancer, aging, cataracts and other eye issues. So, yes, it’s imperative you’re slathering on sunscreen and finding ways to minimise UV exposure.

But there’s a chance that you could be applying sunscreen wrongly or not using enough to give you the UV protection you need. 

How much sunscreen do you really need? 

Well, if you’ve been using just a pea-sized dot or two of sunscreen on your face, that’s not enough. Dr Rachel Ho of La Clinic took to Instagram to delve into the details of proper sunscreen application.

The aesthetic doctor explained that studies show at least 2mg of sunscreen is required per sq cm of body surface. “For an easier estimate, you can use two finger lengths of sunscreen for your face and neck separately,” explained Dr Ho, who has over 10 years of experience in dermatology. Each arm has about the same body surface as the face, so, again, two finger lengths of sunscreen for each arm, though Dr Ho maintained that you may use more as required. “I use four finger lengths of sunscreen for each arm,” she revealed. 

Dermatologist-approved face sunscreens

These are a few of the sunscreens that Dr Ho recommends in a sunscreen round-up on her blog.

(From left) 

• All-round sunscreen: Supergoop Every Single Face SPR-Shield Watery Lotion SPF 50, $53. Buy here
• Tinted/tone up sunscreen (normal to oily skin): Round Lab Birch Juice Moisturising Sunscreen SPF 50, $22.99. Buy here 
• Tinted/tone up sunscreen (dry skin): Sulwhasoo UV Wise Brightening Multi Protector in No.2 Milky Tone Up, $110 at Lazada, Sephora and Tangs

Still wondering if you’re getting enough sun protection? 8days reached out to ask Dr Ho for more sunscreen application tips. 

What else to know about applying sunscreen, according to a doctor 

#1: Apply sunscreen about 10-15 minutes before heading out. This allows the sunscreen to dry on the skin, and prevents it from rubbing off easily on clothing.
#2: Reapply sunscreen every 2-3 hours. 
#3: You need sunscreen even indoors or in the car. “Glass windows do not block out UV rays completely. Glass windows only block out some UVB rays because of their short wavelengths, but UVA rays, which have higher wavelengths, can still pass through glass windows to harm the skin. So whether you’re driving in a car or sitting next to a window, your skin can still be damaged by UV rays,” she cautioned.
#5: Using sunscreen sticks or mist sprays? Here’s how to determine how much to apply. “The recommended minimum amount from the American Academy of Dermatology for sunscreen sticks is four passes; and for sprays, spray until skin glistens,” Dr Ho elaborated. “In reality, we see that sunscreen sticks and sprays differ in their transfer of sunscreen depending on the formulation of the sticks and sprays, as well as factors like wind conditions. So if in doubt, feel free to use more.” 

Face sunscreens highly-rated by shoppers

EltaMD UV Clear Facial Sunscreen SPF 46, $60.67. Buy here Beauty of Joseon Matte Sun Stick 18g, $15.26. Buy here

Supergoop Unseen Sunscreen SPF 40, $59. Buy here

READ MORE: How To Choose The Best Sunscreens For Singapore's Climate

What else can you do to protect yourself from UV exposure?

Besides using sunscreen of at least SPF 30, NEA has also advised the public to take extra precaution against sunburn, such as using umbrellas, sunglasses that block UVA/UVB rays and broad-brimmed hats. 

Oakley Oo9245f Frogskins Asian Fit Rectangular Sunglasses, $109.95. Buy here

Ray-Ban RB4165F Justin Rectangular Asian Fit Sunglasses, $134.81. Buy here

READ MORE: These Ray-Ban Sunglasses That Stars Like Margot Robbie And Tom Holland Love Are Now On Sale For A Limited Time Only

Wpc. Parasol Light Shading Tiny Sax Folding Umbrella, 100% Shading Rate, 100% UV Protection, UPF50+, $26.77. Buy here

umenice UPF 50+ UV Protection Travel Umbrella Ultra Light Weight, $44.97. Buy here

READ MORE: Essential UV-Blocking Items You Need For Sun Protection In Singapore’s Scorching Weather

Uniqlo UV protection wide-brimmed hat, $39.90. Buy here