Acid reflux with belching may be related to the presence of functional indigestion, harmful bacteria and other gastrointestinal diseases. 1. Functional dyspepsia: Acid reflux with belching may be caused by functional dyspepsia, which may be related to recent poor eating habits or bacterial flora imbalance, resulting in a gradual increase in gastric acid, which can lead to acid reflux with belching symptoms in the long run. 2. Harmful bacteria: When harmful bacteria exist in the body, they will ferment during the process of combining with food, thus causing acid reflux with belching. 3. Other gastrointestinal diseases: If there are other gastrointestinal diseases, such as duodenal ulcer, chronic gastroenteritis and so on. Gastric acid reflux with belching may also have other causes, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, give targeted treatment or treatment.