Why Do Some Underwear Develop a “Bleach” Patch? Here’s What It Really Means

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Although a light patch on underwear is usually harmless, women should pay attention to changes that are accompanied by other symptoms. A healthcare provider should be consulted if discharge becomes green, gray, or bright yellow, develops a strong fishy odor, or is associated with itching, burning, pelvic pain, painful urination, or sores. These symptoms may indicate infections such as bacterial vaginosis, yeast infections, or sexually transmitted infections that require proper diagnosis and treatment.

Maintaining vaginal health does not require harsh cleansing products. In fact, experts recommend avoiding scented soaps, vaginal douches, and heavily fragranced hygiene products because they can disrupt the natural balance of beneficial bacteria. Washing the external genital area gently with warm water or a mild, fragrance-free cleanser is generally sufficient.

Choosing breathable cotton underwear may also help reduce moisture buildup and improve comfort throughout the day. Changing out of wet swimsuits or sweaty workout clothing promptly can further reduce irritation and help maintain a healthy environment.