Dyspnea is a common clinical symptom with a certain subjective nature, that is, the patient subjectively feels that there is not enough oxygen and needs to increase the breathing amplitude and frequency to obtain more oxygen. For respiratory distress, first aid is mainly carried out in the following aspects: 1. for mild respiratory distress, rest or oxygen can be administered to relieve it immediately; 2. for moderate to severe respiratory distress, general measures such as rest and oxygen can be given to relieve the symptoms before the cause is clearly identified, and the triggers and causes of respiratory distress should be removed. if the heart load is increased due to elevated blood pressure, the blood pressure should be lowered first If the cause of dyspnea is elevated blood pressure, the first step is to lower blood pressure, reduce the load on the heart and improve heart function. If the dyspnea is caused by acute exacerbation of diseases such as asthma and chronic obstructive pulmonary disease, bronchodilators such as albuterol sulfate aerosol should be used first to relax the bronchial tubes, relieve bronchoconstriction and spasm, and improve lung ventilation to relieve dyspnea. Depending on the development and regression of the disease, prompt medical attention and treatment are required.