The baby fell down the teeth to bite through the lip need to clean the wound and suture, check the condition of the teeth, regular review, etc. It is recommended to go to the hospital in time for examination and treatment. Go to the hospital under anesthesia to clean up the wound, separate the teeth from the lip, check the lip penetration, remove the foreign matter in the wound, disinfect it, and suture the wound in layers. It is necessary to check the condition of the corresponding teeth, take pictures to check, broken teeth need to be treated or extracted in time. After cleaning and suturing, oral hygiene should be maintained, and medication should be changed and sutures should be removed as prescribed by the doctor. Children need to observe the condition of the affected teeth regularly, if there is pulpitis, it should be treated in time; if the permanent teeth will not erupt for a long time after extraction, it is necessary to do gap retainer; if the extracted teeth are permanent teeth, it is necessary to do denture repair. It is recommended that the child be seen immediately and treated by a professional physician to avoid delaying the best time for treatment.