Abdominal bloating, chest tightness and dyspnea may be due to heart disease, respiratory disease, digestive system disease. 1. Heart disease: coronary heart disease, insufficient blood supply to the myocardium, right heart failure, etc. Bloating is caused by stimulation of the stomach and intestines resulting in slowing down of peristalsis, chest tightness and dyspnea is due to heart disease resulting in myocardial or cardiovascular damage, blood supply, oxygen supply is affected, and in severe cases, even lead to heart failure. 2. Respiratory diseases: bronchitis, emphysema, may be due to indigestion and bloating, due to bronchial disease or lung disease leads to patients due to lack of oxygen, chest tightness, dyspnea and other symptoms. 3. Digestive system diseases: reflux esophagitis can cause abdominal bloating, may be due to gastrointestinal indigestion, patients lying down due to changes in body position will lead to gastric reflux to the esophagus, a burning sensation or heartburn sensation, which leads to chest tightness, dyspnea feeling. If the symptoms of abdominal distension, chest tightness and dyspnea occur over a long period of time, it is recommended that the patient go to the hospital in time to find the right cause of the disease and actively give treatment without delay, so as not to cause adverse consequences.