Many people have felt very frustrated and started looking desperately for answers about the odd bleach-like stains on their underwear. Fortunately, the long-awaited solution has finally arrived.It seems that the reason for these "bleach" spots is actually the natural acidity levels of the vagina. Even though it may sound worrying, the explanation confirms that there are no problems with washing machines or the quality of clothing.pH levels are very important in deciding if a substance is acidic or alkaline.Many people have said that this happens often and shows good health. One specific tweet mentions. "It is common to see lighter spots in a woman's underwear because of the acidic pH of the vagina, which ranges from 3.8 to 4.5." I think it's time to stop thinking that it's because of not being clean. A healthy vagina is one that can lighten fabric.