You’re folding laundry and suddenly notice a lighter, almost bleached-looking patch in the center of your underwear.
Your first thought?
“Did something spill on this?”
But here’s the surprising truth: in most cases, it’s completely normal.
Let’s talk about why this happens.
🧪 It’s Not Bleach — It’s Biology
That lighter patch is usually caused by natural vaginal discharge.
The vagina maintains a healthy, slightly acidic environment. On the pH scale, it typically ranges between 3.8 and 4.5.
That acidity helps:
-
Prevent harmful bacteria
-
Protect against infections
-
Maintain a balanced microbiome
But it can also have a mild bleaching effect on fabric over time — especially darker cotton underwear.
👩⚕️ So… Is It a Bad Sign?