Why Your Underwear Has “Bleach Stains” — And Why It’s Totally Normal

Ever noticed mysterious “bleach stains” on your underwear? You’re not alone — and there’s no need to worry. These marks are actually a sign of a healthy body, not poor hygiene.

According to medical experts, the stains are caused by the natural acidity of the vagina, which typically has a pH level between

3.8 and 4.5. This slightly acidic environment helps protect against infections but can also react with fabric dyes, causing light discoloration.

Dr. Vanessa MacKay of the Royal College of Obstetricians and Gynecologists explains, “It’s not a sign of poor hygiene. It’s a sign your vagina is doing its job.”

So next time you see those faded spots, take it as reassurance — your body is working just as it should.

To reduce fabric damage and stay comfortable, consider these tips:

Choose breathable cotton underwear.

Use gentle laundry detergents.

Understand that some discoloration is perfectly normal.

By spreading awareness, we can help normalize natural body processes and reduce shame around women’s health.

Remember: those “bleach stains” aren’t a problem — they’re proof your body is taking care of you.