There are two causes of dental pigmentation: one is exogenous pigmentation, that is, if the patient likes to eat heavily pigmented food, or likes to drink tea or coffee, or likes to smoke, there may be some exogenous pigmentation on the tooth surface, in this case only need to go to the hospital periodontal department for ultrasonic scaling or sandblasting, to clean off some pigmentation attached to the tooth surface. There is another kind of endogenous pigmentation, which may be more complicated. Patients may have suffered trauma or pulp necrosis, which may lead to endogenous tooth discoloration or pigmentation, etc. It is recommended that patients go to the hospital for consultation to clarify the cause and then treat the problem. If you feel that the tooth pigmentation is unsightly, you can undergo treatment measures such as internal bleaching to achieve a more satisfactory color for the patient.