Flatulence, nausea and vomiting may be due to indigestion, intestinal obstruction, gastroduodenal ulcer, chronic gastritis, hepatitis, pancreatitis, autonomic disorders and other causes. 1. Dyspepsia: Eating too much spicy and greasy stimulating food, overeating, unclean food and other factors lead to weakening of peristalsis of the gastrointestinal tract, dyspepsia, food stagnation and the above symptoms. 2. Intestinal obstruction: Mechanical intestinal occupation, torsion, or intestinal vascular obstruction and other factors lead to intestinal stenosis and obstruction, intestinal peristalsis is weakened or even disappeared, so the above symptoms appear. 3. Gastroduodenal ulcer: ulcerative lesions of gastric mucosa lead to restriction of digestive function, abdominal pain, acid reflux, heartburn, nausea, vomiting, abdominal distension and other symptoms. 4. Chronic gastritis: Helicobacter pylori infection and other factors lead to chronic inflammatory exudation, hemorrhage, atrophy and other changes in the gastric mucosa, limiting the digestive function and resulting in the above symptoms. 5. Hepatitis: necrosis and apoptosis of liver cells and tissues, limitation of liver’s function of synthesizing and secreting bile, resulting in limitation of lipolysis, and inability to digest fatty foods, which leads to the above symptoms. 6. Pancreatitis: After the destruction of pancreatic tissue, pancreatic protease, pancreatic lipase, pancreatic amylase and other digestive enzymes are secreted abnormally, resulting in indigestion and the above symptoms. Flatulence, nausea and vomiting may be related to a variety of factors, it is recommended to consult a doctor for a clear diagnosis.