The normal age for children to change teeth is between 6 and 12 years old, and it is normal for some children to change teeth at the age of 5. For some children who change their teeth at the age of 5, it is usually normal if they do not have any abnormalities such as bad odor or swelling in the mouth. Although most children change their teeth between the ages of 6 and 12, early tooth replacement can be caused by adequate nutritional intake, trauma, etc. Therefore, it is normal for some 5-year-olds to change their teeth, and parents do not need to worry too much. If the 5-year-old child in addition to tooth replacement, accompanied by oral malodor, swelling, increased body temperature and other symptoms, is an abnormal phenomenon, need to be vigilant for apical periodontitis, caries, gingivitis and other oral diseases. During the child’s tooth replacement, parents should let the child develop good oral hygiene habits, rinse mouth or brush teeth in time after meals. If your child changes teeth early, it is recommended that you take your child to a doctor in time to have your teeth examined by a specialist for any abnormalities. During the period of tooth replacement, children should try to warm and cool, easy to digest food, avoid eating hard texture, spicy and stimulating food, and should also control the intake of sugar.