Thanks to the pandemic, we’re all at home way more than usual — and that’s a good thing, from a public health perspective. But all that sitting around at home isn’t without risk, especially if you’re not, uh, airing things out on a regular basis.

David Kim, a board-certified dermatologist in California, tells Allure a sedentary lifestyle puts people at a higher risk than ever for jock itch, which is an uncomfortable, itchy rash that thrives in warm, sweaty areas of the body, like the groin and under the breasts. “Constantly sitting traps heat and moisture in the groin, which increases the risk for jock itch,” he says. “Anything that’s tight-fitting and not as breathable can put you at a risk for an infection.”

Wondering if you’re at risk, or if your existing rash might be related to a fungal infection? Here’s everything you need to know about jock itch, according to dermatologists and an OB-GYN.