Bile reflux in babies often refers to bile reflux, which can lead to chronic gastritis and symptoms such as abdominal pain and lack of appetite. Bile reflux occurs in babies due to various reasons, and the refluxed bile can reduce the barrier function of the gastric mucosa to ions, and the hydrogen ions in gastric juice enter the gastric mucosa to cause its inflammation, resulting in a series of symptoms. The common symptom is recurrent abdominal pain, which often occurs during or after eating. Most of them are intermittent hidden pain or dull pain in the upper abdomen and umbilicus, and some of the more serious children may have severe colic, etc. In addition, lack of appetite may occur. In addition, lack of appetite, nausea, vomiting, abdominal distension and other symptoms may occur, which may affect the nutritional status and growth and development of the child. When the symptoms described above occur in babies, it is recommended to consult a doctor in time, and to make a clear diagnosis and carry out targeted treatment as soon as possible, so as to avoid delaying the condition.