Children with mouth ulcers on their tongues need to identify the cause of the mouth ulcers. Generally mouth ulcers are divided into recurrent ulcers and traumatic ulcers. If it is a recurrent ulcer, it is important to check specifically what is causing the ulcer to recur. If it is a traumatic ulcer, the local irritant needs to be removed. Generally, mouth ulcers do not require any medication and can be treated with topical medication. For the mouth ulcer of children’s tongue, usually hold the mouth clean, the baby’s diet should be nutritious, eat more vitamin-rich food, not to eat stimulating food. If the traumatic ulcers are caused by the decay of teeth, treat the decayed teeth in time. Parents must pay attention to the health problems of teeth in the mouth, take the baby to check the teeth regularly, and do the filling treatment in time if there is tooth decay. For children’s mouth ulcers, you can use watermelon cream spray or children’s version of open throat sword spray topically, and prevent local infection, usually to develop a good habit of brushing teeth, to maintain good oral hygiene. You should eat a reasonable diet, eat more fruits and vegetables, and not be picky about what you eat. To supplement the baby’s body lack of some trace elements. This will be beneficial to the oral health of children.