Where do the white marks that we sometimes find on women’s underwear come from? | May 25, 2025

We’ve all noticed those whitish marks on our panties at some point. At first, we think it’s a poorly rinsed laundry detergent, hard water, or worse… a hygiene issue. What if, on the contrary, it’s a sign that everything’s fine down there? This common, often misunderstood phenomenon could very well reveal excellent vaginal health. Here’s why.
A natural phenomenon, a sign of a healthy vagina

The vagina is a veritable defense factory : it naturally self-cleanses thanks to beneficial bacteria called lactobacilli. These allies create a slightly acidic environment (with a pH between 3.8 and 4.5), which prevents harmful microbes from growing.

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