The main reasons for hiccups are as follows: 1. hiccups are caused by upper gastrointestinal diseases such as esophageal hiatus hernia, dyspepsia, chronic gastritis, gastric ulcer, cholecystitis, etc. In patients with esophageal hiatus hernia, the esophageal sphincter is dysfunctional and the closing function is incomplete. The long retention time of food in the stomach causes gas, nausea, vomiting, hiccups and other discomforts. Patients with chronic gastritis also experience nausea, bloating and hiccups due to inflammatory stimulation of the gastric mucosa, which affects the digestive function of the stomach. 3. Patients with gastric ulcers experience heartburn, nausea, bloating and hiccups due to the destruction of the protective layer of the gastric mucosa and the secretion of stomach acid. 4. It is obstructed and cannot help the small intestine to digest fat, which can cause bloating, nausea and hiccups.