It is recommended to consult a doctor for timely extraction if the milk teeth have not fallen out after the teeth have grown out (clinically known as retained milk teeth). Retained milk teeth refers to the replacement period of teeth, due to the milk teeth did not fall out in time, and cause the inherited permanent teeth ectopic eruption; which mainly occurs in the lower anterior teeth or traumatized milk teeth, if not extracted in time will lead to the emergence of permanent teeth crooked and irregular phenomenon. The extraction process of retained milk teeth is to first apply local anesthesia to the milk teeth to be extracted, and then after successful anesthesia, the milk teeth will be extracted by using special extraction tools (e.g., extraction forceps or dental extractors). Therefore, it is recommended to consult a doctor for the extraction of a baby tooth in a timely manner, and it is not advisable to perform the extraction at home to avoid bleeding or infection and inflammation.