1. Correct eating habits. Foods rich in protein, calcium and vitamins such as meat, fish, eggs, milk, soy milk, tofu, fruits and vegetables will help the healthy development of children’s teeth. Sweets are the big enemy that affects teeth. Candy, sweet food with stickiness or carbonated drinks can cause tooth decay and also affect appetite, so it is very important to avoid children from eating snacks or candy before meals, and they should rinse their mouth immediately after eating sweets, which is very important to protect teeth; 2. Develop a correct method of brushing teeth after eating, the food residue left in the teeth or mouth is the main cause of tooth decay, so cleaning the mouth is The most important aspect of protecting teeth. Before your child learns to brush his teeth, it is best to give him some boiled water or develop the habit of rinsing his mouth after he has eaten to rinse the food residue in his mouth. Once the baby’s teeth have grown in, you can teach him the correct way to brush and let him develop good brushing habits; 3. If tooth decay or other abnormalities are found, early treatment should be provided.