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Here's the thing. You wear underwear all day long (we think). So, you're likely trapping perspiration down there, which can cause irritation and even infection. Plus, you're probably familiar with the, ahem, olfactory complications that comes with it. So, when you're adding a workout to all of that, just imagine the vaginatastrophy (yes, we just made that word up) that could occur.
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For your next gym trip, try avoiding 100% cotton panties, says Dr. Mark. Instead, look for ones that have a wicking quality. Don't worry — it'll say so right on the label. Of course, if you want a more natural option, you can get ones made of organic bamboo (which are super soft, we might add).
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Regardless of the fit you prefer for your underwear, you should get seamless ones to avoid chafing. "Chronic irritation and rubbing can cause abrasions that could go deep enough to cause darkening of the skin or permanent scarring," explained Dr. Lee. Um, yikes. New weekend project: panty raid. (Women's Health)