In general, belching without acid reflux or heartburn is considered to be caused by cold, functional indigestion, chronic gastritis and other stomach diseases. 1. Cold: rain, too little clothing or a sudden drop in temperature caused by cold, resulting in abdominal distension, easy to cause belching, bloating, etc., may also be accompanied by a cold, fever and other symptoms. 2. Functional dyspepsia: refers to the absence of organic diseases, digestive tract dysfunction caused by dyspepsia, abdominal pain, bloating, diarrhea, belching and other symptoms, may also be accompanied by loss of appetite and other symptoms. 3. Stomach diseases: such as chronic non-atrophic gastritis: refers to gastric mucosal inflammation not accompanied by glandular atrophy, intestinal mucosal metaplasia, can cause gastric mucosal localized congestion, edema and other inflammatory manifestations. Loss of appetite, bloating, belching and other symptoms, or no symptoms, only in the gastroscope can be observed in the gastric mucosa non-atrophic gastritis performance. Belching without acid reflux or heartburn may also be a one-time consumption of a large number of gas-producing foods, such as cauliflower, yogurt and other indigestion symptoms. In addition, they do not feel acid reflux heartburn, does not mean that there is no acid reflux, may be a type of gastroesophageal reflux disease without clinical manifestations, it is recommended to consult a doctor in order to clarify the diagnosis, targeted treatment.