There is no fastest solution for children’s mouth ulcers, such as baby mouth ulcers, can be improved through drugs, diet and other aspects of the specific analysis is as follows: 1. Drugs: children with mouth ulcers need to be used under the guidance of a doctor to open the throat sword spray, if necessary, can follow the doctor’s instructions to add glucocorticosteroid patches, such as dexamethasone acetate patches, can help the healing of mouth ulcers. 2. Diet: When mouth ulcers need to pay attention to a light diet, avoid eating spicy and stimulating food, otherwise eating hot food, or spicy and stimulating food may lead to pain aggravation. If a child has a mouth ulcer, do not listen to the prescription, it is recommended to go to the hospital in time for the relevant treatment, clear the cause of the disease and actively follow the doctor’s instructions for treatment.