Many women notice bleach-like stains on their underwear and worry something is wrong. In most cases, this is completely normal. The discoloration is caused by the natural acidity of vaginal discharge, which helps protect the vagina from harmful bacteria. When this acidic fluid sits on fabric, it can lighten the color over time—similar to bleach.
Normal vaginal discharge can be clear, white, or slightly milky, with a mild odor and varying consistency throughout the menstrual cycle. Even healthy discharge can cause fabric bleaching, so stains alone are not a sign of infection.
However, changes in discharge may signal a health issue. Warning signs include strong or fishy odor, green, gray, or bright yellow color, thick “cottage cheese–like” texture, excessive watery discharge, itching, burning, pain during urination or sex, or bleeding outside your period. These symptoms can be linked to yeast infections, bacterial vaginosis, STIs, or hormonal changes and should be checked by a healthcare provider.
Maintaining vaginal health includes avoiding douching, using mild unscented soap externally, wearing breathable cotton underwear, practicing safe sex, staying hydrated, eating a balanced diet, and attending regular gynecological checkups.
In short, bleach-like stains are usually harmless and a sign that your body’s natural defenses are working. Pay attention to changes in odor, color, or discomfort—and seek medical advice if something feels off.
