If you've ever come across light brown or bleached stains on your partner’s underwear, you might have had questions or even concerns. But here’s the truth: those marks are not only normal — they’re a sign of a healthy body.
Let’s break down the reason behind these common stains and why understanding them matters for both men and women.
🧬 The Science Behind the Stains
The vagina maintains its health by keeping itself clean through natural secretions, most of which are slightly acidic. This acidity is measured by a scale called pH, and the typical vaginal pH ranges from 3.8 to 4.5 — similar to black coffee or tomato juice.
That acidity is primarily due to the presence of lactic acid, which is produced by beneficial bacteria called Lactobacilli. These bacteria help keep bad bacteria and infections in check — a natural defense system.
When vaginal discharge touches underwear, especially dark-colored fabric, it may cause fading or bleaching stains over time. This is particularly noticeable on black or dark blue underwear, where the acidic discharge lightens the fabric.
🧼 Is It a Hygiene Issue?
No — not at all. In fact, seeing this kind of discoloration is often a sign that your partner has a well-balanced vaginal environment. It’s not an indicator of poor hygiene or uncleanliness, but of the body doing exactly what it was designed to do.
Regular washing and breathable cotton underwear can help minimize staining, but it won’t stop entirely, because the natural pH is always at work.
🩲 What to Do About It?
Here’s what women (and men) should keep in mind:
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