Call it a sign of the times: Korean skin care brands Dr. Jart+ and Peach & Lily offer collections of “maskne essentials” on their websites. Patch purveyor Hero Cosmetics recently posted an entry about “maskne” on its blog. But don’t dismiss maskne — acne and irritation from wearing a mask — as just another portmanteau to market skin care products.

“Oh, it’s a real thing,” said Dr. Mona Gohara, an associate clinical professor of dermatology at Yale School of Medicine. She herself has gotten maskne from her three layers of masks: a KN95 (similar to an N95) topped with a surgical mask to keep it clean, plus a face shield for procedures.

“Oh, my God, you can just feel things forming with the oil and sweat swishing around,” Gohara said.

Maskne — the most common kind is acne mechanica, aka the type of acne a football player may get where the helmet rubs — is also enough of a thing that the COVID-19 task force of the American Academy of Dermatology felt compelled to release advice on the subject.

Frontline workers in health care and other fields are most at risk because their masks are tighter fitting and they are wearing them longer. A research letter published in The Journal of the American Academy of Dermatology reported that at least 83% of health care workers in Hubei, China, suffered skin problems on the face. And anecdotally, doctors report an increase in acne flare-ups in people outside health care as well.

“Conversations about acne have hit a record high in my practice and in my direct message box on Instagram,” Dr. Whitney Bowe, a dermatologist in New York City said in an email. That’s because masks can worsen existing skin issues or cause new ones. Add the summer heat and humidity and you’ve got a petri dish for breakouts.

HOW TO AVOID MASKNE

Consider the type of mask you wear.

Only you can decide how you want to balance the weight of the mask material with the level of protection it will give you, but dermatologists suggest 100% cotton because it allows skin to breathe a bit. As the temperature rises and you sweat more, you’ll need to keep the mask clean.

“You need to treat it like underwear and wash it frequently,” said Dr. Candrice Heath, an assistant professor of dermatology at the Lewis Katz School of Medicine at Temple University. “You don’t want all of that oil and sweat and dirt to sit there and then you reapply it to your face constantly.”

Streamline your skin care routine.

Many of us use too many beauty products anyway, so consider mask-wearing a good excuse to adopt the most basic skin care routine: a gentle nonsoap cleanser and a mild, fragrance-free moisturizer.

“Fewer ingredients is better than more,” said Dr. S. Tyler Hollmig, the director of dermatologic surgery at the Dell Medical School at the University of Texas, who likes drugstore brands like Eucerin and CeraVe. The moisturizer, besides its usual task, can protect skin from mask friction, a la a runner’s chafing cream.

Another reason for using fewer products: The mask will intensify product delivery to your skin. (You’ve seen this side effect of occlusion in action if you’ve ever, say, treated dry, cracked feet by applying Vaseline and wearing socks to bed.) But in the case of products with acids or retinols, which can be irritating, intensifying delivery is not likely to be a good thing.

Dr. Carrie Kovarik, an associate professor of dermatology at the University of Pennsylvania and a member of the AAD’s COVID-19 task force, suggests using products with actives only at night. If you’ve never used a retinol — dermatologists charmingly call this “naive skin” — Kovarik said that “now is not the time to try one.” If you’re a seasoned user, you may need to reduce your usage.

Break up with makeup (at least for now).

If you put on makeup for a video call, consider taking it off when you go out. Heath gently chides patients who appear onscreen at teleappointments wearing a full face of makeup.

“This is the time to really tone it down,” she said. For those who absolutely can’t break the habit, she suggests a tinted moisturizer with sunscreen.

If you sweat underneath your mask, Dr. Shari Marchbein, a dermatologist in New York, suggests using micellar water or a gentle cleanser to do a quick wash when you take it off. (Overwashing your face dries it out, tricking it into thinking it needs to produce more oil, which can give you more of the acne you’re trying to avoid.) Either apply moisturizer or, if it’s late enough in the day, whatever products you would use at night, Marchbein said.

How to treat it

If you do end up with maskne, keep in mind that acne treatments can be irritating and you still need to contend with the continued irritation of the mask.

“You can just go gangbusters on regular acne,” Gohara said. “With maskne you have to be really careful.”

Gohara recommends using an over-the-counter benzoyl peroxide treatment only on the spots, and starting with a 2.5 or 5% concentration, not 10%. If you use retinol, apply that product one night and the spot treatment the next.

If you have black or brown skin and develop hyperpigmentation from the acne, Heath recommends a topical with glycolic acid, which can treat both the blemishes and the darkening of the skin. She cautions against long-term use of a skin-lightening agent without the advice of a dermatologist.

If you’ve tried all of the above and your acne persists, you may want to look at two other causes of acne: stress and diet.