Children’s mouth ulcers belong to the category of traditional Chinese medicine pediatric diseases mouth sores, can be treated with internal Chinese medicines, medicines external treatment method. Children’s mouth ulcers may be related to wind-heat multiplying the spleen, heart fire, spleen and stomach heat, deficiency fire upward, respectively, can be used in proprietary Chinese medicines pediatric black bean and chiao granules, cattle yellow detoxification tablets, clearing down the tablets, Zhi Bai Di Huang Pills for the treatment of the above drugs are not yet clear about the adverse effects of the drugs, if you need to use the medication, it should be carried out under the guidance of a physician. External treatment can use appropriate amount of ice boron powder, Qingdai powder, watermelon cream, bead yellow powder applied to the affected area to treat the actual evidence; can also be used to open the throat sword aerosol spray applied to the affected area for the heart fire inflammation, spleen and stomach accumulation of heat evidence; medicine to take the appropriate amount of Cornus officinalis powder external application of Yongquan acupoints can be used for the false fire to float evidence. Children should keep their mouths clean, pay attention to dietary hygiene, ensure nutritional intake, strengthen exercise to avoid infection. If there is any discomfort, it is recommended to consult a doctor in time, do not do it on your own, so as not to cause adverse consequences.