The main interventions for dental caries in young children are hygiene, fluoride treatment and fissure sealing treatment. 1. Pay attention to hygiene: usually, you need to pay special attention to the dental hygiene of young children, clean their teeth every day, and eat less food with high sugar content. 2. Fluoride treatment: Every 3~6 months, you can go to the doctor for fluoride treatment, or use fluoride toothpaste to brush your teeth, both of which can prevent caries. 3. Fossa sealing treatment: When the first permanent molars appear in young children, they can go to the doctor for fossa sealing treatment to prevent tooth decay. Usually need to develop good eating habits, it is best not to give children too much food at once, but also need to take young children to play sports, enhance resistance.