Black stains on teeth are generally due to pigmentation or caries, can be removed by scaling, filling caries and other ways, as follows. 1. Scaling: black stains on teeth may be smoke stains left by smoking, tea stains left by drinking tea, taking food and drugs with pigmentation caused by hyperpigmentation or located in the neck of the teeth stained black tartar, these can be improved by ultrasonic scaling in the stomatology department. 2. Filling caries: If the black stains on the teeth are caused by caries, it is necessary to remove the decayed and stained tooth tissues, and then fill them with resin materials to restore the beauty of teeth. If the black stains on the teeth do not improve, or accompanied by other symptoms, you should go to the hospital in time, with the help of the doctor for targeted treatment.