Gastric distension and hidden pain, commonly caused by digestive diseases, such as acute gastritis, reflux esophagitis, peptic ulcer, etc., can also be seen in cardiovascular disease, such as acute coronary syndrome. 1. Digestive system diseases: such as acute gastritis, reflux esophagitis or peptic ulcer, due to inflammation, gastric acid stimulation of the stomach and the digestive tract mucosa or gastrointestinal peristalsis slow down food retention and other factors resulting in gastric distension hidden pain symptoms. 2. cardiovascular disease: when myocardial ischemia or acute coronary syndrome, can reflexively appear in the mouth of the stomach bloating hidden pain, manifested as gastric distension and pain in the stomach area, the majority of patients will be thought to be the cause of the stomach, the wrong condition. The symptoms of bloating and pain must be taken seriously, and it is recommended to go to the hospital as soon as possible, to clarify the causes so as to facilitate active treatment, to avoid delaying the condition.