Bloating and pain in the abdomen may be caused by functional dyspepsia, chronic gastritis, liver and gallbladder diseases, and heart diseases. 1. Functional dyspepsia: the patient’s gastrointestinal peristalsis is reduced, after eating, food will accumulate in the digestive tract and cannot be emptied smoothly, resulting in abdominal distension, abdominal pain and other discomfort. 2. Chronic gastritis: chronic inflammation of the gastric mucosa due to a variety of causes, which can cause epigastric discomfort, such as abdominal distension, abdominal pain, etc., and can be accompanied by loss of appetite, nausea, acid reflux and other symptoms. 3. Hepatobiliary diseases: patients with liver cirrhosis may have symptoms of abdominal distension, accompanied by decreased appetite, emaciation, fatigue and other symptoms. Spontaneous peritonitis may manifest as pain in the whole abdomen. Chronic cholecystitis may have frequent right upper abdominal discomfort, hiccups, fullness, hidden pain and other symptoms. 4. Heart disease: acute myocardial infarction will appear in the precordial region of the pain symptoms, pain radiating to the abdomen caused by abdominal pain, can also be accompanied by gastrointestinal symptoms, such as abdominal distension, nausea, vomiting and so on. There are many other reasons for abdominal distension and pain, so it is recommended to go to the hospital and ask the doctor to make a judgment and identify the cause.