Mouthwash Brands Should I Be Worried About This Mouthwash?

Should I be worried about this mouthwash? - mouthwash brands

I bought the brand of mouthwash, Wal-Mart the other day, and the first use, I found a small blue stained teeth.

It does not really disappear, but I use it twice a day and have been in recent days.

Should I stop using it? Do you think that the teeth bruises?