white vinyl with blue spot

[strainsa]

I have a white vinyl bathroom floor that has a blue spot or stain that is about 1 square foot. It has been there about 4 years. I was told once that it was caused the glue that was used. Someone recently told me that it is caused by water or mold. Anyone know which story is right?

[pushkins]

Both answers are correct, tho water usually causes more of an opaque discoloration to happen. (sorta looks like an oil stain a blackish/blueish color)

Make sure the stain is isolated by itself, if it comes from under a cabinet or near the toilet or shower then further investigation would be required. Usually if it is a water related problem the stain would tend to "grow" as it is exposed more and more.