Breathlessness and tightness in the chest always want to take a deep breath, can be caused by the environment is too closed, mental stress or overwork caused by episodic dyspnea, the most important feature of this dyspnea is to be alone quietly more obvious, the activity work is not affected. Generally, it can be relieved by a little rest and fresh air. Causes of frequent dyspnea are numerous, mainly due to respiratory diseases and cardiac lesions, but also due to systemic diseases involving the respiratory system: I. Respiratory diseases: 1. Causes: common respiratory inflammation, asthma, edema, tuberculosis, tumors and other compression of the airway, or chronic obstructive pulmonary disease causing airway narrowing or obstruction. In addition, pleural inflammation, pneumothorax, pleural effusion, and thoracic trauma compress the lungs to prevent normal contraction and expansion, resulting in shortness of breath, accompanied by chest tightness, thus always wanting to take a deep breath; 2. Treatment: Patients should be in sitting or semi-sitting position to keep the airway open. Strengthen back percussion and nebulizer inhalation, and cough up sputum via oral and nasal cavity, and use salbutamol and aminophylline to relieve bronchospasm, etc. Second, circulatory system diseases: 1, etiology: commonly caused by various causes of cardiac insufficiency, cardiac compression, pulmonary embolism and primary pulmonary hypertension, etc., insufficient blood supply to the heart caused by myocardial ischemia, thus causing chest tightness and shortness of breath, always trying to relieve symptoms by deep breathing; 2, treatment: appropriate amount of oxygen, the presence of primary chronic disease patients can take nitroglycerin, quick-acting heart pills, isosorbide nitrate After relieving the symptoms, patients can seek timely medical treatment under the guidance of doctors. Third, other diseases: such as menopausal syndrome, plant nerve dysfunction, neurosis and other neurological disorders can also appear due to the performance of chest tightness, breathlessness, always want to take a deep breath, the need for timely medical treatment for differential diagnosis, and then targeted treatment to relieve symptoms as soon as possible.