The feeling of stomach bloating, nausea and regurgitation may be caused by gastrointestinal dysfunction, chronic gastritis, gastroduodenal ulcer, gastric cancer, pyloric obstruction and cirrhosis of the liver. 1. Gastrointestinal dysfunction: bad dietary habits such as overeating and eating cold and spicy food lead to weakening of physiological peristalsis of the gastrointestinal tract and indigestion, which results in this symptom. 2. Chronic gastritis: Helicobacter pylori infection and other factors lead to chronic inflammatory reaction of the gastric mucosa, mucosal exudation, bleeding, atrophy, erosion and other changes and symptoms. 3. Gastroduodenal ulcer: increased secretion of gastric acid leads to ulcerative changes in the gastroduodenum and these symptoms appear. 4. Gastric cancer: malignant hyperplasia of gastric mucosa leads to the destruction of normal tissues and weakening of digestive function, so the symptoms appear. 5. Pyloric obstruction: after healing of duodenal ulcer and formation of scar, it leads to narrowing and obstruction of pylorus, and the discharge of gastric contents is blocked and the symptoms appear. 6. Cirrhosis of the liver: necrosis and apoptosis of liver cells and tissues, abnormal liver function, bile and other secretion disorders, resulting in indigestion, so the symptoms. The feeling of stomach bloating, nausea and regurgitation may be related to a variety of factors, it is recommended to actively seek medical advice to clarify the diagnosis.