When the teeth are black, the first thing is eating habits. If a person often eats sugar or food with high sugar content, it will easily lead to black teeth. As we all know, children who love candy are prone to tooth decay, and so are adults. If you eat too much polysaccharide, sugar will corrode your teeth. If you don't rinse your mouth in time, it will lead to stains or blackening of your teeth.

The second is to smoke regularly. Smoke contains a lot of smoke tar and nicotine, which will cause serious damage to teeth and lead to blackening of teeth. If you smoke a lot, you will generally form a black stain line near your teeth, which is hard and hard and can't be dug out.

The third is water quality. If the mineral content of water in a certain area exceeds the standard, it is easy to cause tooth blackening. For example, we have a county where people's teeth are generally dark because the mineral composition in the water is a bit messy. So try to drink some filtered water to keep your teeth white.