Generally, the four incisors in the upper and lower jaws erupt first between the ages of 6 months and 1 year. With the eruption of the teeth, there will be redness, swelling and pain in the gums. By the age of 2, most children have all 20 baby teeth. Although they will eventually be replaced by permanent teeth, it is still important to take good care of the baby teeth. This is because the healthy growth of the baby teeth takes up space for the eruption of the permanent teeth in the future, and if the baby teeth are damaged, they can also cause malformation of the permanent teeth. Among all ages, children are the most prone to dental caries because they eat frequently, love to eat sweets, and are not skilled in brushing their teeth. Therefore, we must help them to clean their teeth and brush at least twice a day. In addition, we must also pay attention to the healthy diet, eat less sweets, drink less carbonated drinks, and eat more vitamin-rich and nutritious food. Also, take your child to the dentist regularly, they will catch the problem early and guide you on how to clean and take care of your child’s teeth properly.