Feeling chest tightness and lack of oxygen are mainly considered to be caused by respiratory and cardiac diseases, which are easily caused by chronic bronchitis, emphysema, bronchiectasis, pneumothorax, and acute bronchitis. Pulmonary CT and pulmonary function tests, as well as blood gas analysis and routine blood tests are required. It can be treated with bronchodilators and effective antibacterial drugs, and oxygen is also needed to relieve the symptoms. In case of coronary artery disease, myocardial ischemia is also easy to cause, it will be accompanied by palpitations and chest pain, which need to be treated with drugs to dilate coronary arteries, and also need to be treated with lipid-lowering drugs. It is also easily caused by neurosis, depression, and female menopausal syndrome, and needs to be examined in the hospital and treated actively under the guidance of a doctor.