If you’ve noticed pale or “bleached” patches on your underwear after washing, you’re not alone—and there’s a perfectly natural explanation for this. It isn’t your detergent or a malfunction of your washing machine; it’s actually due to your body’s natural chemistry.
The vagina maintains a slightly acidic environment, with a pH between 3.8 and 4.5. This acidity, supported by good bacteria called lactobacilli, keeps the area healthy by preventing infections. The acids and secretions in vaginal discharge can interact with dyes in your underwear, causing the fabric to lighten and create bleach-like spots.
This phenomenon happens most often on darker underwear or synthetic materials and is more noticeable if the fabric remains damp for a while. While it might look alarming, it is a good sign that your vaginal ecosystem is balanced.
However, if you experience itching, unusual smells, or discolored discharge, you should consult a doctor. Otherwise, the presence of these faded patches simply means your body is healthy.
To manage the appearance, wearing breathable cotton underwear or light-colored underwear can reduce visibility. Using panty liners during times of increased discharge also helps keep underwear fresh.
So next time you see these bleach marks, appreciate that they are just your body’s natural defenses in action.
