The causes of postprandial bloating are mainly seen in: 1, gastrointestinal dysfunction, mainly due to neuropsychiatric factors, chronic diseases, such as diabetes, etc., the dominant gastrointestinal nerve loses its normal regular activity, showing that the food after eating cannot enter the intestine and manifests itself as postprandial bloating, which can be accompanied by belching, eructation and other symptoms, and in serious cases, nausea and vomiting; 2, bad eating habits, especially Irregular diet, long-term heavy drinking, eating is not easy to digest, etc., can appear self-regulation of gastrointestinal function disorders, indigestion, thus appearing after meals bloating; 3, drug factors, long-term use of drugs that cause gastrointestinal distention, such as acarbose, after taking the drug can appear abdominal distension, bloating, increased exhaust and other symptoms, can disappear after stopping the drug.