Gastroscopy is not recommended for children, mainly because they are younger and may be uncooperative and more likely to cry and argue during gastroscopy, making it more difficult for the doctor to operate. Even if children are under general anesthesia, it is easy to cause injury. Although it is said that in recent years there are gastroscopes suitable for children’s size and general anesthesia is performed for gastroscopy in children, which avoids the difficult operation to some extent. However, because the stomach lumen is relatively small and children are more prone to abdominal distention, the risk during the operation is still relatively high. In addition, because the mucosa is weaker in children, it is easy to cause local mucosal damage and may even lead to gastroesophageal reflux, causing the contents of the digestive tract to reflux into the respiratory tract, which may cause misaspiration, and in serious cases, may cause lung infection and even endanger life. Therefore, gastroscopy is generally not recommended for children, and there are fewer malignant lesions in the stomach in children, most of which are gastritis, peptic ulcers, or gastroesophageal reflux, which can usually be improved by using gastric mucosal protectants, or anti-H. pylori treatment. In the case of diseases that need to be clearly diagnosed by examination, such as gastroesophageal reflux, gastric diaphragmatic hernia, and gastric torsion, alternative examinations can also be performed using upper gastrointestinal imaging.