Tooth decay is also commonly known as worm teeth, professionally known as dental caries, both children and adults, the cause of tooth decay is due to the invasion of bacteria into the hard tissues of the teeth, which causes decay and damage to the hard tissues of the teeth. For this situation, specifically for babies, there are several reasons as follows: firstly, children’s oral cleaning power is not strong, if parents do not clean children’s teeth in time, food residues and bacteria will stay in children’s mouth for a longer time. Secondly, the problem of children’s own eating habits, children often eat food with high sugar content and sticky food, this kind of food is more likely to stay in the teeth, and over time it is easy to form dental caries.