Some parents think that children can’t brush their teeth and that brushing is an adult task, so they give up the requirement to brush their teeth. Many children do not start brushing their teeth until all their permanent teeth have come in. The result of this is to increase the dental disease of children, which is not good for the oral health of children and affects the digestion and even the development of children. This may also be one of the reasons for the high incidence of caries among children in China. So when should children start to brush their teeth? In principle, children should brush their teeth as soon as they have teeth, but because children’s teeth start to grow from 6 months old, until 2 years old, all the milk teeth are fully grown, until 3 years old, the roots of milk teeth are fully developed, children are too young to use toothbrush at the beginning, so from the beginning of milk teeth eruption to about 2 years old, parents can first use sterilized gauze dipped in cold boiled water or clean cool water to scrub the growing teeth 1-2 times a day, and scrubbing before bedtime is especially important. After a period of time, then gradually teach children to rinse their mouths. 2-3 years old milk teeth have gradually come out, the development of complete, you can choose a suitable small toothbrush to start learning to brush teeth, with the help and supervision of adults, every day after breakfast, lunch and bedtime each brush, in the brush teeth to teach the correct method of brushing, and education to understand the importance of brushing teeth, to develop good hygiene habits.