There is no quick fix for children’s mouth ulcers, common causes include recurrent aphthous ulcers, white stuff syndrome, traumatic mouth ulcers, etc. Different causes are treated differently, please follow the doctor’s instructions for standardized treatment. 1. Recurrent Aphthous ulcers: this is a relatively common oral mucosal disease, children suffering from this disease will appear in the mouth ulcers, for a single round or oval ulcers, commonly used drugs are lidocaine gel, compound borax gargle, and so on. 2. Leukoarai syndrome: the cause of the disease is unknown, oral ulcers are its typical symptoms, so children with oral ulcers should also be alert to the disease. Drugs mainly include anti-inflammatory drugs such as ibuprofen, glucocorticoids such as methylprednisolone, immunosuppressants such as cyclophosphamide, biological agents such as interleukin 6 antagonists. 3. Traumatic oral ulcers: by the physical, chemical injury or cold and hot stimulation caused by the oral mucosal damage, children will appear oral ulcers, can be treated by local anti-inflammatory pain medication, such as 0.05% chlorhexidine gargle, ice boron powder, etc.; can also be taken orally vitamins, such as vitamin B2 and other vitamin drugs. Children with mouth ulcers specific treatment program according to the cause and individual decision, there is no so-called quick solution, please follow the doctor’s instructions to standardize the treatment, the above drugs need to be used under the guidance of a doctor.