1.Dental caries will destroy the normal structure of teeth. Some children have pain or blocked teeth when eating, so they dare not bite some food, which affects the nutrition absorption of children and the physical quality decreases; some children chew food with other side teeth because of the pain and discomfort of the affected side teeth, which will lead to the asymmetry of the jaw bone and chewing muscle development of children in the long run, and even cause the asymmetry of the face. 2.If the baby tooth caries is not treated in time, the caries cavity will become deeper and deeper, which will lead to the development defect and eruption abnormality of permanent teeth and eventually cause malocclusion. 3.Incomplete milk teeth, the whole tooth bed is not complete, the child will pronounce clearly because of wind leakage, which not only affects their language development, but also makes their self-esteem and self-confidence suffer a blow, which has a negative impact on the psychology. 4.Serious dental caries will have streptococcus pyogenes into the blood circulation and even spread to other organs of the whole body. Therefore, once children are found to have caries, they must go to the stomatology department of regular hospital for consultation and treatment as soon as possible, so that they can suffer less and the treatment effect is also good.