Flatulence should not be caused by stomach cancer, but may be caused by functional gastrointestinal diseases, such as functional dyspepsia. It may also be caused by benign diseases of stomach, such as chronic gastritis, gastroesophageal reflux disease, gastric ulcer, duodenal ulcer and so on. If the patient is not assured, it is recommended to go to the hospital as early as possible, and cooperate with the doctor to improve the electronic gastroscopy, only through the electronic gastroscopy plus pathological biopsy can gastric cancer be clearly excluded. However, if no lesion is found under gastroscopy, doctors will not do pathological biopsy, unless suspicious lesions are found, such as erosion, swelling, white spots, etc., then doctors will take mucosal biopsy and send it to pathological biopsy, so patients need to understand. In the presence of flatulence can be appropriate use of acid suppression drugs or drugs to help digestion, the specific use of drugs can consult a specialist.