Fluorosis is a condition seen in teeth in which your body has been exposed to too much fluoride. In normal doses (typically found in a safe drinking water system and an ADA-approved toothpaste), fluoride is a healthy compound that promotes strong teeth, which helps to fight cavities and other problems.
But sometimes, fluorosis occurs when fluoride-containing toothpastes or rinses are swallowed instead of expelled.
Fluorosis causes some aesthetic problems, including abnormally chalky or darkened stained teeth. While such problems are generally harmless to your health, they can create concerns with your dental appearance.