There is no fastest solution for baby mouth ulcers, in the treatment is mainly symptomatic supportive treatment, followed by the need to improve from the dietary habits, specific analysis is as follows: 1. Improve dietary habits: during the mouth ulcers, may be due to the pain caused by the baby reluctant to eat, in this case should avoid eating some hot, spicy, crumbs more food, otherwise it may lead to aggravate the pain in the baby’s mouth. You can give your baby some cool liquid food to avoid the symptoms of discomfort in the baby’s mouth aggravated. 2. Promote wound healing: oral ulcers when the baby’s skin surface will appear ulcers, accompanied by pain, can be under the guidance of the doctor to be dexamethasone to promote the healing of the ulcer surface. If necessary, can be added with open throat sword spray and other drugs symptomatic supportive treatment. If your baby has mouth ulcers, you need to use medication to treat them under the guidance of a doctor.