The physiological loss of children’s milk teeth and the eruption of permanent teeth to replace the milk teeth is a typical manifestation of the tooth replacement period, which is a physiological phenomenon. If a child’s milk teeth are not completely lost, and permanent teeth grow in the position of or next to the milk teeth, it will cause teeth to overlap each other, affecting the normal growth of permanent teeth. In this case, you can take measures to speed up the loss of milk teeth according to the advice of a professional dentist or choose to pull out the milk teeth, and most of the permanent teeth can erupt normally. Before removing the milk teeth, you can use a sterile cotton swab to shake the milk teeth, if the milk teeth have been loosened, you can let the child chew more tough food, through physical action to accelerate the loss of milk teeth, the eruption of permanent teeth will gradually return to the normal position. However, care should be taken to avoid removing loose teeth by oneself through external force, so as not to cause bleeding, pain and other adverse consequences. If the above methods are not feasible, you can go to the relevant dental hospital or regular clinic to have your baby teeth extracted in time. Generally speaking, the doctor will take an X-ray before extraction to confirm the position of the milk teeth and permanent teeth, the structure and shape of the roots. If the child has any fear or anxiety, parents should give positive reassurance to ease the child’s emotions, which in turn will facilitate the smooth completion of the extraction. In addition, during the period of tooth replacement when the milk teeth and permanent teeth coexist, the teeth in the mouth may appear untidy, and it is easy to retain food debris between the gaps in the teeth, so parents should urge the child to do a good job of oral hygiene, to do morning and evening brushing, and rinsing the mouth after meals. When loose milk teeth are about to fall out, children should be told to avoid licking the loose teeth with their tongues to prevent the normal eruption of permanent teeth.