The problem of teeth is related to the health of the organism. Pay attention when black spots appear on teeth, which may be caused by tooth decay or pigmentation. 1.Tooth decay: If you do not strengthen the care of your mouth in daily life, and do not brush your teeth on time and take care of them regularly, it will easily lead to the accumulation of food in your teeth for a long time and form plaque and calculus on your teeth. In serious cases, deep or shallow caries will appear on the surface of the teeth. If it is not controlled timely, the discolored place will eventually form cavities, and the appearance will look like many black spots, and it will also bring pain, so it is recommended to go to the hospital for consultation in time, and usually take the method of repairing and extracting. 2.Pigmentation: If you smoke, drink tea and coffee for a long time in your daily life, it will easily lead to pigmentation, and if your teeth are not cleaned and taken care of on time, black spots will appear on your teeth in the long run. If the black spots on the teeth are caused by pigmentation, it is recommended to go to the dentist for scaling and regular health care to get obvious results; if the black spots on the teeth are caused by tooth decay, it is recommended to go to the hospital to take treatment according to the situation.