Many kinds of diseases can lead to breathlessness, and our first aid for different diseases is also different: 1. If the patient has dyspnea due to asthma, we can inhale fast-acting bronchodilators, such as Ventolin and Adequan, and we need to inhale glucocorticosteroids, such as Symbicort or Solitaire, and take oral leukotriene modulators, such as montelukast sodium. 2. If the patient has dyspnea due to cardiac insufficiency, we should take cardiac, diuretic and vasodilator drugs for treatment according to the heart rate and blood pressure, commonly used cardiac drugs include digoxin and cetiran, commonly used vasodilator drugs include sodium nitroprusside, nitroglycerin, isosorbide mononitrate, commonly used diuretics include furosemide, spironolactone, etc., and at the same time, we should perform comprehensive treatment such as hypotension and lipid lowering.