Teeth have not fallen out and grow new teeth need to go to the hospital in time to extract the milk teeth. When new teeth grow out before the teeth fall out, it will affect the normal eruption of permanent teeth, leading to abnormal alignment of permanent teeth and crowding of teeth, etc. Therefore, it is necessary to remove the milk teeth so that the permanent teeth can be adjusted to the normal level as soon as possible, so as not to affect the development of teeth in the later stage. Timely removal of the milk teeth will help the permanent teeth to return to their correct position. If the permanent teeth have not returned to the correct position after the extraction of the milk teeth, you can wait until all the teeth have been replaced before going to an orthodontist for orthodontic treatment. In daily life, special attention must be paid to the patient’s diet, to change the bad dietary habits, and also need to pay attention to oral hygiene, to avoid the emergence of oral diseases.