Pediatric canker sores can be treated with medication, general measures and other treatments. The causes of pediatric canker sores are mainly related to immunity, genetics, systemic diseases and microorganisms, etc. Parents are advised to apply iodized glycerin to the affected area under the guidance of a doctor, which can play a role in astringency. Parents can also take vitamins such as Vitamin B₂ and Vitamin E orally to replenish the nutrients that the child lacks. In addition to medication, parents should pay attention to balancing the child’s diet in daily life, and eat fresh vegetables and fruits, such as green vegetables, eggplant, oranges and so on. When the child has mouth ulcers, the child should be allowed to develop healthy habits and ensure oral hygiene. In addition, the child should be allowed to exercise properly. When infants have pediatric mouth ulcers, parents should bring their children to the hospital in a timely manner, under the guidance of the doctor for treatment, not self-medication.