What does it mean when you dream of bleach?

Answer 1

This seems to be a variation of a cleansing dream, representing the need for purification, forgiveness or a fresh start. Because bleach is a whitener, used to remove stains, it might very well relate to Christian imagery of the blood of Christ that removes sin, making the believer "as white as snow." The white as snow or "whiter than white" is common in commercials for bleach and laundry detergent. Alternatively, the dream could mean nothing more than a smell of disinfectant from an adjacent bathroom has influenced the dreamer's sleep.

Answer 2

It means that you were thinking about bleaching teeth before you went to bed. That's all it means. It doesn't mean anything bad. You could've just have been thinking about bleaching teeth.