It’s a habit most of us rarely question. After a long day, we slip into our favorite cotton panties or comfy shorts and head straight to bed.

But recent findings are casting doubt on this well-worn routine. According to some lingerie experts, sleeping in underwear might actually harm both our comfort and our intimate health. Curious? Here’s what they’ve uncovered—you may never look at your lingerie drawer the same way again.

A breeding ground for intimate discomfort

We don’t always realize it, but underwear—even cotton—can trap heat and moisture throughout the night. This creates the perfect environment for bacteria and yeast to multiply. The result? A higher risk of discomforts like itching, irritation, or even unpleasant infections.

Experts at the French brand Belle Lingerie recommend going lighter at night—or skipping underwear altogether—to let this sensitive area breathe freely. A small change that could save you a lot of trouble.

Irritation, friction… and unhappy skin

At night, our skin is supposed to regenerate. But prolonged contact with lace, elastic, or synthetic fabrics tells a different story—especially if you toss and turn in your sleep. Rubbing, redness, or rashes can appear quickly. For those prone to eczema, the irritation can become particularly disruptive.