Bad stomach can lead to dyspnea when there is a serious disease. Bad stomach is mainly characterized by indigestion, bloating, stomach pain, nausea, vomiting, acid reflux, belching, and the common causes are weak spleen and stomach, gastritis, gastric ulcer, gastric ptosis, and so on. As these diseases do not affect the respiratory system, they are not accompanied by dyspnea during the period of illness. However, some people suffer from poor stomach because of serious gastric diseases, such as gastric perforation and varicose veins of the fundus of the stomach, which will lead to a large amount of blood loss in the body during the onset of the disease, and the patient will also be accompanied by mental stress, which will lead to the manifestation of dyspnea. A part of the people will also be due to severe blood loss and shock, the patient’s life threatening, in the occurrence of stomach bad at the same time dyspnea, should go to the hospital in time for abdominal ultrasound, gastroscopy and other tests to confirm the diagnosis of the disease, once found to have a serious disease should be rescued in time for treatment.