When a child’s tooth is extracted and the broken root is not extracted, if the root left behind is relatively small and has no inflammatory reaction, no special treatment can be done; however, if the scope of the remaining root is relatively large and combined with an inflammatory reaction, it needs to be extracted. After the tooth is extracted, if the scope of the remaining root is relatively small, the surrounding teeth have no inflammatory reaction, and there is no obvious redness, swelling, pain, and other symptoms, no special treatment can be done first, because the broken root may resorb on its own and merge with the alveolar bone. However, it is important to pay attention to oral hygiene during this period to reduce the risk of secondary infection. If the root of the tooth is not extracted during the extraction process, and the residual range is relatively large, and the surrounding teeth have obvious symptoms such as inflammatory edema, pain, etc., it is generally recommended to promptly reduce the inflammation, but wait until the symptoms are completely eliminated, and then the root of the tooth will be extracted. The child’s teeth are not extracted, it is recommended to take pictures to determine the length, in the absence of adverse reactions can follow the doctor’s instructions not to do special treatment, once any discomfort is found, should promptly consult a doctor.