Left heart failure leads to a decrease in the ejection volume of the heart and the accumulation of excess blood in the left ventricle, while the pulmonary circulation mainly pumps blood into the left ventricle, which increases the load on the left heart and leads to an increase in circulatory pressure in the lungs, resulting in pulmonary edema. After left heart failure leads to pulmonary edema, patients mainly present with dyspnea, especially after activity or when lying down, and the symptoms of heart failure are relieved when sitting or resting. For recurrent pulmonary edema in left heart failure, it means that the patient’s heart failure symptoms are more severe, and medications should be actively applied to prevent the exacerbation of heart failure and improve the long-term prognosis of heart failure. For recurrent pulmonary edema, care must be taken to prevent cold and flu to avoid inducing heart failure.