For children with tooth pigmentation, a consultation and examination at the dentistry department can be conducted, and after the diagnosis of pigmentation is confirmed, polishing can be chosen to remove it. For example, selenium ions or polishing cups dipped in polishing paste can be used to gradually polish the surface to remove the pigmentation, and regular cleaning is recommended. You can brush your teeth well at home and master the correct way of brushing. The common way is the pasteurized brushing method, and children can also choose to use the circular method if they are not good with it. If the heavier ones can choose to remove by scaling, the common way of scaling is the ultrasonic shock cleaning, which can remove the surface stains and pigmentation. Whitening can be done if necessary, usually using oxidizing agents to oxidize the surface enamel, which is beneficial for the aesthetics of the teeth.