Yellow teeth stains, usually caused by incomplete oral cleaning, smoking, drinking tea and other reasons, patients can follow the doctor’s instructions through the teeth cold light whitening, scaling and dental veneers and other methods of treatment. 1. Teeth cold light whitening: you can follow the doctor’s advice to remove the stones and soft scale on the surface of the teeth, apply whitening gel on the surface of the teeth, and then use a special cold light lamp to irradiate, prompting it to carry out the oxidation-reduction reaction, to achieve the whitening effect. 2. Scaling: You can follow the doctor’s instructions through the special ultrasonic scaler for scaling, removing yellow stains on the surface of the teeth, plaque and part of the calculus, so that the yellow calculus is removed, the teeth become cleaner. 3. Dental veneers: If the yellow teeth stains are more serious and the effect of cold light teeth whitening is not obvious, patients can also choose dental veneers to cover the yellow teeth to achieve the effect of teeth whitening. Patients want to treat yellow teeth stains, it is recommended to go to the regular hospital stomatology department for consultation, under the guidance of the doctor reasonable treatment.