Dental caries in children can interfere with tooth replacement, and severe caries can lead to oral infections. Dental caries in children can lead to apical periodontitis, retained milk teeth and malocclusion. 1. Periapical inflammation: Children’s dental caries is easy to cause periapical inflammation, if the periapical inflammation recurrence, which is not conducive to the growth and development of permanent teeth, will affect the children’s subsequent tooth replacement. 2. Retained milk teeth: If children’s caries are not removed in time, the milk teeth will be retained in the mouth, resulting in obstacles to the eruption of permanent teeth, thus affecting the children’s tooth replacement. The subsequent extraction of milk teeth will be required. 3. Malformation of teeth: Children’s dental caries can easily lead to malformation of teeth, children’s dental caries will make the permanent teeth eruption time is abnormal, and in serious cases, it will also lead to malformation of teeth and jaws. If children are found to have dental caries, they should go to the hospital for relevant examinations and actively cooperate with the doctor for treatment.