The phenomenon of gastrointestinal indigestion is considered to be caused by digestive system diseases such as chronic gastritis, functional indigestion, or other systemic diseases such as hypothyroidism. 1. Digestive system diseases: chronic gastritis can appear gastrointestinal peristalsis decreased, dyspepsia symptoms, such as early satiety, abdominal bloating, etc.; cirrhosis of the liver due to liver function decline, portal vein pressure increase and other factors can cause abdominal bloating and other dyspepsia symptoms, can be accompanied by nausea, abdominal pain and other symptoms. 2. Functional dyspepsia: gastrointestinal symptoms may occur repeatedly, but not accompanied by organic lesions, symptoms include postprandial fullness, early satiety, epigastric pain and so on. 3. Other systemic diseases: hypothyroidism patients due to thyroid hormone deficiency or thyroid hormone resistance can appear low metabolic syndrome, which in turn causes bloating and other indigestion symptoms. It is recommended to go to the hospital and ask the doctor to make a judgment if there is always indigestion in the stomach.