Black stains can be removed by maintaining oral hygiene, developing good living habits, healthy diet, dental cleaning and other ways. 1. Maintain oral hygiene: patients usually need to pay more attention to oral hygiene, brush their teeth diligently, and also need to rinse their mouth with water after eating. Patients can also use dental floss, toothpicks, gap brushes and other appliances to remove food debris in the gap, which is conducive to the improvement of black stains on teeth. 2. Adopt good living habits: patients usually need to develop good living habits, try to quit smoking and drinking, to reduce the stimulation of pigment on the surface of the teeth, which will help to remove black stains on the teeth. 3. Healthy diet: patients usually need to ensure regular diet, minimize the consumption of food with high pigment content, and also need to avoid drinking coffee, strong tea, etc., can promote the improvement of dark stains. 4. Scaling: If the patient’s teeth black stains are more serious, and through the above way the effect is not good, it is also necessary to pass the way of scaling, the use of instruments to remove the black stains on the gums, so as to delay the plaque, tartar precipitation, and reduce the local stimulation. It is important to note that dental caries may also manifest as darkened teeth. Patients are advised to go to the hospital stomatology department for a checkup when they have black stains on their teeth to avoid delayed treatment.