A small amount of bile in the stomach lumen is not serious if treated promptly. A small amount of bile in the stomach cavity indicates that the patient has bile reflux. Bile reflux usually leads to gastritis, gastric ulcer and intestinal epithelial hyperplasia, etc. If treated in time, it is not serious, but there is a small probability that cancer will occur, therefore, it needs immediate treatment and regular checkups. A small amount of bile in the stomach lumen indicates that the patient has bile reflux. As bile reflux can destroy the gastric mucous membrane barrier, so it can lead to gastric mucous membrane changes such as erosive gastritis, gastric ulcer, etc. Prolonged bile reflux can also lead to gastric mucous membrane cells to develop intestinal epithelialization. These diseases are not serious, but they can lead to hemorrhage, gastric perforation and other serious complications. If you find a small amount of bile in the stomach lumen, it is recommended that you consult a doctor in a timely manner to find out the cause, and follow the doctor’s instructions to improve the relevant examinations, treatments, and regular review.