Chest tightness, difficult to breathe, need to be combined with specific medical history and clinical features, for comprehensive analysis and judgment. If the young people have chest tightness, difficult to breathe, most often seen in the respiratory system diseases, such as acute attacks of bronchial asthma, or a large amount of pleural effusion, as well as the emergence of spontaneous pneumothorax, you can improve the chest X-ray or CT examination of the lungs in a timely manner for clarification. If the elderly people have chest tightness, hard to breathe, first of all, we should consider whether it is a cardiac cause, such as coronary heart disease or other causes of cardiac insufficiency, but also can be seen in the acute exacerbation of chronic obstructive pulmonary disease. Therefore, you can improve the electrocardiogram, cardiac enzyme spectrum, cardiac ultrasound and pulmonary function tests for clarification in time.