Functional dyspepsia in children has no characteristic clinical manifestations, and is usually divided into typical symptoms (such as nausea, vomiting, belching, etc.) and other symptoms. 1. Typical symptoms: the more common typical clinical symptoms in children are nausea, vomiting, belching, epigastric pain, loss of appetite, early satiety and other digestive disorders, usually lasting more than one month, or the cumulative duration of more than three months in a year. 2. Other symptoms: some children may be accompanied by anxiety, insomnia, headache, depression and other mental symptoms. Therefore, when the child has gastrointestinal discomfort, parents should take the child to the hospital in time for treatment under the guidance of the doctor. And should also adjust the child’s diet, eat more vegetables and fruits, drink more hot water and so on.