Yellow teeth can be treated with scaling, cold light whitening and porcelain teeth. 1. Scaling: If the teeth are yellow due to calculus and pigmentation, scaling can remove the calculus and so on, and it can also help to remove the pigmentation on the surface of the teeth, so that the teeth can restore the original color, after scaling, we should pay attention to correcting bad habits, and pay attention to brushing the teeth every day. 2. Cold light whitening: through a high-intensity blue light source, irradiated by a special whitening agent coated on the teeth, the whitening agent through the dentin tubules in the shortest possible time and over the years deposited on the surface of the teeth and deep pigmentation oxidation reduction, to help restore the teeth white. 3. Porcelain teeth: For tetracycline, dental fluorosis and other endogenous stained teeth, it is recommended to help teeth whitening through professional veneers, porcelain teeth and other ways. It is recommended to go to a regular dental specialty hospital for treatment.