Patients with gastric distension and chest tightness have the following causes: 1. acute and chronic gastrointestinal diseases: such as acute and chronic gastritis, gastroesophageal reflux disease, gastroparesis, portal hypertensive gastropathy, gastric tumors, etc., can affect respiratory function and chest tightness due to severe abdominal distension, and gastroscopy should be performed to clarify the cause. 2. pulmonary diseases: such as chronic obstructive pulmonary disease, tumors of the lung and pulmonary embolism, etc., should be taken seriously and Give CT examination to exclude organic lung diseases. 3, psychological factors: Do not exclude the discomfort symptoms such as stomach distension and chest tightness caused by neurosis in some patients. When the above situation occurs, seek medical attention immediately and give comprehensive examination and treatment under the guidance of a doctor to avoid delaying the condition.