The correct term for caries should be dental caries. Caries is caused by the black coloring of the tooth after demineralization and decomposition of the tooth, which can be treated by preparing a cavity to remove the black decayed material and then filling it with a resin, and if there are symptoms of inflammation or necrosis in the pulp, root canal treatment should be performed before filling. Caries is the progressive destruction of dental tissues under the combined effect of bacteria and other factors. The treatment method is generally to use special dental tools to remove caries and fragile tooth structure, form cavities, and then use composite resin to fill and cure the cavities in layers to restore the normal structural shape of the tooth, as well as its aesthetics and function. If the caries is deeper and the pulp of the affected tooth is already inflamed or necrotic, root canal treatment should be followed by resin filling treatment. It is recommended to go to the hospital to receive regular treatment.