My sister is too shy to ask about this so I'm going to do it for her because I'm concerned. About 6 months ago, she noticed that occasionally on her panty-liners during a week before/a week after her menstrual cycle, the material would develop a greenish-blue tint. It doesn't look like a discharge, her urine color is normal, there isn't really any odor...She's had a ton of bloodtests and nothing's shown up as being abnormal and we're kind of at a loss as to what it could be. Our initial thought was some sort of STD but she hasn't had a partner in a year and she and her partner were both clean at that time, they were always protected, etc.
Anyone ever have something similar happen? Any thoughts as to what it could be? We're not sure how concerned we should be about this, but it's VERY peculiar.