Suddenly feel breathlessness suffocation shortness of breath, may be myocardial ischemia, heart failure, asthma, pneumothorax and other causes, can be based on the cause of the relief of blood supply, reduce the burden on the heart, control asthma, puncture and other treatments. 1. Myocardial ischemia, one of the common causes, insufficient blood supply leads to chest tightness and shortness of breath, which requires timely use of nitroglycerin and other relief of blood supply. 2. Heart failure, diastolic and systolic dysfunction of the heart muscle, resulting in similar symptoms, the need to promptly reduce the burden on the heart, the use of diuretics such as furosemide, cardiotonic agents such as digoxin and so on. 3. Asthma, acute bronchial asthma attack, may appear chest tightness shortness of breath performance, timely use of salbutamol and other control of asthma, release bronchospasm. 4. Pneumothorax, chest tightness and shortness of breath is one of the typical manifestations of pneumothorax, can be carried out lung puncture, through the pumping to relieve the symptoms.