Stomach bloating and breathlessness occur because of poor peristalsis of the sinuses and more gas in the stomach such as epigastric fullness, which is the main symptom of dyspepsia. Pyloric obstruction may also occur, with nausea, vomiting, epigastric fullness, and vomiting of food that has been separated or undigested. Functional dyspepsia is usually caused by irritating food, diet, emotion, climate and environmental factors that lead to weakening of gastric peristalsis, epigastric fullness, belching, vomiting, etc. Gastroscopically, it can be manifested as chronic superficial gastritis or chronic atrophic gastritis, and gastric retention can also occur when there are duodenal bulb ulcers or gastric sinus ulcers causing pyloric obstruction, with upper abdominal fullness, nausea and vomiting. This is accompanied by epigastric fullness and requires surgical intervention to relieve the upper gastrointestinal obstruction.