The main causes of dyspnea are the following: 1) heart disease, or the patient himself has a psychosomatic disorder of cardiac origin, and airway obstruction; 2) respiratory system diseases, in addition to airway stenosis, airway foreign bodies, airway tumors, or enlarged thyroid gland compressing the airway, can produce the so-called dyspnea; 3) some patients are rhinitis, sinusitis, can also feel dyspnea. So the treatment of this disease must first clarify the cause. If there is airway obstruction, treat the airway obstruction. If the airway obstruction is not lifted, dyspnea can be life-threatening. If cardiac disease is the cause of dyspnea, treat the primary cause. Respiratory system diseases, in addition to airway stenosis, asthma, airway spasm, vasoconstriction can also cause dyspnea, and COPD can also cause dyspnea, especially when the lungs feel breathless during activity.