There is no clinical non-ulcer dyspepsia, usually seen in functional dyspepsia, the patient will have epigastric discomfort, postprandial fullness or early satiety, epigastric flatulence and other symptoms, but the manifestations will be more persistent, or recurrent episodes, while some patients may also be accompanied by neurological and emotional symptoms. 1. Upper abdominal discomfort: the symptoms of middle and upper abdominal discomfort will occur, which is related to eating, and the pain will appear after meals, but sometimes the pain has no obvious regularity. 2. Feeling of fullness: usually after eating, patients will have a feeling of postprandial fullness, but sometimes in the case of hunger eating will soon appear fullness. 3. Flatulence in the upper abdomen: patients with functional dyspepsia mostly suffer from indigestion, causing flatulence in the upper abdomen. In addition to the above typical symptoms, some patients may also be accompanied by mental and emotional symptoms, such as insomnia, anxiety, depression, headache and so on.