Heartburn, nausea and bloating on both sides of the abdomen are common symptoms of gastritis. Heartburn and nausea are considered to be caused by increased secretion of gastric acid, and bloating on both sides of the abdomen is mostly considered to be caused by delayed gastric emptying and indigestion. Gastritis is mostly caused by Helicobacter pylori infection, autoimmune function abnormality, gastrointestinal tract power abnormality and other causes of gastric mucosal inflammation. After the gastric mucosa is damaged, the function of the stomach will be affected, and a large amount of gastric acid will be released, which will lead to acid reflux, heartburn, nausea and other symptoms. Poor gastric digestion will result in food retention, indigestion, poor appetite, bloating and other symptoms. If gastritis is diagnosed, it is recommended that it be treated under a doctor’s supervision to relieve symptoms such as heartburn, nausea and bloating.