If a baby breaks in the mouth, the wound should be treated immediately. If the wound is not deep and there is no obvious bleeding, you can locally disinfect it with iodophor, cotton ball compression for about 10 minutes can be, pay attention to protect the injured mucosa, try not to remove it, can retain as much as possible. Also carefully check whether there is any foreign body residue in the wound, be sure to remove it. If the wound is deeper and bleeding more, you should go to the hospital stomatology to close the wound, but also intramuscular injection of tetanus toxoid. Within a week of the injury, avoid eating spicy and irritating food, avoid eating food that is too hot, drink warm water, keep the area clean, disinfect regularly with iodophor, and rinse the mouth with mouthwash. Generally the wound does not need to be bandaged, and the wound will basically heal after a week.