There are no parasites inside the teeth, and this should be about how to treat tooth decay (caries). Caries should be treated by paying attention to oral hygiene and filling treatment. 1. Pay attention to oral hygiene: the occurrence of dental caries is usually related to the lack of attention to oral hygiene, so you should often brush your teeth and rinse your mouth to ensure that the mouth is clean. When brushing teeth, you can choose fluoride toothpaste, which can effectively reduce the formation of caries. Children need to use fluoride toothpaste under the guidance of adults to avoid swallowing or using too much. 2. Filling treatment: If caries occurs and pits are formed, resin material can be used directly for filling and repairing to prevent the degree of caries from worsening. Children should pay attention to oral hygiene and seek medical treatment as soon as possible.