A loose tooth that does not fall out and a new tooth that grows out (clinically known as a retained tooth) must be extracted and treated by a doctor. Retained milk teeth is one of the common diseases in pediatric dentistry, which is mainly caused by abnormal root resorption of milk teeth or obstacles to the eruption of permanent teeth, and its main symptom is the eruption of permanent teeth while the milk teeth are loose but cannot fall out in time. The main symptom is the eruption of permanent teeth which are loose but cannot be removed in time. It is recommended to consult a doctor in time for extraction treatment to avoid the symptoms of abnormal eruption or crookedness of permanent teeth caused by stagnant milk teeth. The extraction process mainly includes local anesthesia, tooth extraction and wound compression to stop bleeding, etc. After the tissues around the tooth are effectively anesthetized, the tooth is extracted with professional tools such as extraction forceps or dental extractors, and then cotton balls or gauze are used for compression to stop bleeding.